Pratique du Shadowing: What If you Could See the 4th Dimension? - Apprendre l'anglais à l'oral avec la vidéo
Création de la leçon...
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Today, we're turning you into a multi -dimensional super being.
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You'll be able to be anywhere and any place at any time you want.
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Walk through walls on a whim, melt through the steel doors of a bank vault, and just take what you want.
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That doesn't sound legal.
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But that stuff is just child's play compared to what you can really do.
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You can see through anything.
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As you walk past a stranger in the street, you notice something.
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Turn back, reach into their body, and remove a cancerous tumor, saving their life.
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For a little R &R, you sip margaritas and watch the ancient Egyptians build their pyramids in a time lapse.
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Their secrets are interesting, but you're already on to bigger adventures.
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You stand at the center of the Sun just to see what it looks like in there
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and to work on your tan.
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You surf the rings of Saturn.
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You defy physics as we know it and travel throughout the universe, instantly appearing on planets millions of light years away.
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In terms of capabilities, you are so far above the old mythical gods and their cheap tricks.
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Compared to gods like Zeus, who only controlled thunder and lightning, you make them look like ants.
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You see through time.
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You understand and control everything in our three -dimensional world.
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Okay, enough, enough.
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At this point, you're probably wondering, how did I get these powers?
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Why is this so awesome?
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Well, to understand your new life as a four -dimensional super being, I'm going to have you relive every single dimension you came up through.
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But don't let this 4D business go to your head.
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Four dimensions are only the start.
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Compared to being in the fifth, sixth, or even twelfth dimension, you're an inchworm trapped on a two -dimensional branch.
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Okay, to understand dimensions, let's take you back to zero.
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Yeah, you're now in a place where there are no dimensions at all.
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A single dot that has no space, no size.
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Even a pencil mark on a piece of paper has thickness and dimensions.
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But where you are right now is just a theoretical point.
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Now, from your position in a zero -dimensional space, you would see nothing and there would be no place to go.
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So it's pretty boring as far as dimensions go.
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But add one dimension, and we upgrade you to a one -dimensional space.
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Now you live on a line.
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In this line universe, you'd only be aware of the line ahead of you and the line behind you, nothing else.
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In fact, you'd be looking at the line head -on, so it would just look like a dot ahead of you and a dot behind you.
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In theory, you could go forward along the line forever, but that's it.
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Let's call this length.
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It's slightly more exciting than zero dimensions, but not by much.
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Add yet another dimension and now you live in a world with another line at a right angle to the first one.
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You exist on a surface now.
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This is width, something I'm learning a lot more about as i get older now you can go forward backward
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or in any combination of these two directions you can slide around on the surface as much as you like
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but there's no thickness to this world it's perfectly flat as
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you move around with your newfound freedom in this 2d world you would see everything edge -on.
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Everything would look like a line.
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In two dimensions, a circle would appear just as a line, the length of its diameter.
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The only reason a representation of a two -dimensional circle appears to look like a circle is because, as three -dimensional beings, we look at it from above.
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Yeah, being one dimension up from any other dimension automatically gives any being god -like powers over
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that lesser dimension
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if a three -dimensional being wanted to imprison you in your
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two -dimensional world all they have to do is draw a
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line around you no matter what you did you couldn't escape you couldn't step over
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that line there's no up no down no over
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or under for you
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and unfortunately for you you've come down with a life -threatening case of appendicitis while visiting the 2d world But even worse,
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your 2D doctor has a hard time finding your appendix because they have to look through you edgewise to find it.
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And if they do find it, well, they'll have to cut through you to get at it.
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But you don't have to worry because a three -dimensional doctor comes to your rescue.
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Because you're perfectly flat, you have no layers, so a three -dimensional doctor looking down on you can see everything that is you.
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They can clearly see your appendix, and they don't even have to pierce any skin to remove it.
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They just pluck it out.
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And for you, it would just disappear.
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But when a 3D doctor comes to visit you in your 2D world, that's when things get really weird.
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Because a three -dimensional being visiting a two -dimensional world would appear as only a cross -sectional slice of them.
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The 3D Doctor would appear out of nowhere to you, a line of varying width, and then disappear into thin air as they pass through.
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It'd be like seeing magic or being haunted by a ghost.
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But you don't have to think about it for very long, because you're getting another major upgrade.
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Yeah, we're giving you the dimension that makes us who we are.
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The third dimension, depth.
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Suddenly, the world opens up to you.
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You're back in familiar territory.
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Objects have volume and mass.
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And we can see this volume.
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A circle can be a sphere, and you can see all around it, and hold it, and throw it, because it can also move in three directions.
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Plus, it contains space, volume for stuff to be inside of it.
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Now, if you had appendicitis here in three dimensions, well, that same doctor who saved you back in the two -dimensional
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world would have to look through you using x -rays to examine your appendix.
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And if they wanted to remove it, well, they'd have to cut through all your layers to get at it.
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You should really boost your fiber intake.
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You're getting appendicitis a lot.
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Now, if we wanted to imprison you in a three -dimensional world, we'd need a cube.
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Trapped inside, you can move up, down, right, left, any combination of those, but you're not getting out of this cube.
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Part of why we love the three -dimensional world is because we're a product of it.
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It's our home.
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But without all three of our familiar dimensions,
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it's arguable that literally nothing as we understand it or experience it would exist.
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It's also why it's a big leap for us to step outside of it.
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So take one last look at your comfortable three -dimensional world
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because you're about to leave it for some very unfamiliar territory and godlike powers.
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Okay, here we are at the edge of our perceptions, and you're about to take a jump into a dimension beyond anything you've ever known.
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The fourth dimension.
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But what does that mean?
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Well, there are a few different ways to look at dimensions.
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One way is through the lens of physics.
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First, you might be surprised that as far as physics is concerned, you're already a fourth dimensional being and you don't even realize it.
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Yeah, Einstein theorized that time is the fourth dimension.
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And time is something we're all very familiar with.
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If three dimensions give us volume, then time gives us events.
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If time didn't exist, nothing would happen, or everything would happen, but all at the same moment.
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We live in three dimensions, but we move in time.
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Meet you at the gym?
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Well, that's a location in space, but if I say meet you at the gym at noon, then that's a location in space and time.
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Also, if I say meet you at the gym at noon, count how many appendages I have, because you're likely talking to an alien.
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Now, we might be creatures of this fourth dimension, but we don't have access to time.
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Except for Marty McFly and Doc Brown, we happen to be very terrible time travelers.
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In fact, it seems like we are trapped by time, unable to change speed or direction.
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We're stuck going in one direction and traveling at the, more or less, constant speed of one second per second.
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That is, unless you're accelerating.
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Einstein's theory of relativity opens up a whole host of interesting… time travel options
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if you watched interstellar well you'd know that accelerating
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and being in deep gravity affect the rate at which you experience time relative to an outside observer
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as you sink deeper into gravity you slow down crawling through time like you're trapped in slow motion now
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if you wanted to time travel you could hitch a ride
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on an ever accelerating a rocket ship around a black hole and pop back to Earth.
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The journey for you might only take an hour, but you could wind up thousands of years in the future.
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Good luck getting close enough to a black hole, though.
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Now, in our everyday lives, we experience time like a movie, exposed to slices or frames of time as we move forward,
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never being able to see beyond the present, and only remembering the past by storing it in our memories.
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So, let's give you access to the fourth dimension of time.
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Now you can see everything that's happened before and everything that's going to happen in the future.
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You can see the timeline.
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You hold it in your hands like a strip of film.
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You can scroll up and down through it.
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You can go to any spot in the filmstrip at will.
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Now, if we tried to trap you inside that cube from earlier,
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well, you could simply just move to a time either before or after you were trapped in the cube, or before the cube even existed,
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or long after it was destroyed.
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Now you have access to a new dimensional direction.
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You could appear and disappear anywhere.
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And also, knowing what has happened before and what is about to happen would give you amazing powers.
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Like, if you were in university, well, just go forward in time.
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Check the answers to the test and write them down.
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Boom, A -plus every time.
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Yeah, well, that might sound awesome, but what's the value of a university education when just playing the lottery and getting mega -rich would be a no -brainer.
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You'd just have to zip into the future, look up the winning numbers, and skip back in time to play them and collect your winnings.
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No job or degree needed.
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But really, what's the point of money
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if you can just go back in time and alter the deed to any house or boat or anything, and just make it yours to begin with?
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The world is your oyster.
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Or is it?
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You see, time travel might have some serious complications.
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There are two main schools of thought about it.
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In the first case, you see an accident happen, a car hits a pedestrian.
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Of course, you step back in time and stop that person from stepping out into traffic, saving their life.
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But now that person goes on to become a careless scientist and makes a virus that wipes out humanity.
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Or on a whim, you travel to ancient Egypt to unlock the secrets of how the pyramids were built.
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You're careful not to be noticed or to touch anything, but you accidentally kill a mosquito that lands on your arm.
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Because of you, that poor mosquito never gets the chance to spread the malaria it carries, subtly altering the course of Egyptian civilization.
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Then, 2 ,000 years later, the Egyptians defeat the Romans, instead of the other way around, and Rome collapses centuries earlier,
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and history has changed forever.
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Boom, you're speaking Danish.
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Durvelkommen.
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Every person you interact with, every lottery you win, every step you take, changes the timeline.
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It's called the butterfly effect, and it makes time travel a messy proposition.
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As a four -dimensional time -traveling being, you see these changes ripple out from you as you go across time.
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But what if the timeline isn't changeable?
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Determinism says that nothing can be truly changed because the outcome of everything is already set.
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After all, if you can see the future, then it's already set.
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In this case, you've always been the fourth -dimensional traveler that you've become, and everything you do has already been done.
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Nothing's new.
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You can travel up and down the timeline of human history,
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geological history, cosmic history, and everything you do and see has already happened.
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Controlling time could be the most amazing curse you've ever received, or it could just be a Disney Express pass to the best ride in the universe,
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but one you only get to watch and not interact with.
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But what if we look at the fourth dimension through the lens of geometry?
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What about the physical fourth dimension?
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Four -dimensional physical space is a mathematical description of space beyond three dimensions.
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If length is perpendicular to width and depth is perpendicular to both length and width,
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then this new direction is perpendicular to all three.
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Think of a 3D cube.
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No, I'm not trying to imprison you again.
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If you take 4D geometric space and project it out from every corner of that three -dimensional cube,
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well, that's a 4D hypercube called a tesseract, and it looks like a cube inside a cube.
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But that's only a three -dimensional representation of four -dimensional space, a shadow of the reality.
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It's actually impossible to accurately represent 4D physical space, unless we're already in the fourth dimension.
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But you can see it, because we're upgrading you!
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Say goodbye to the constraints of the physical world, and welcome to your new life as a four -dimensional super being.
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By the standards of our three -dimensional space, you now have the powers of a god.
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The first thing you'd notice as a four -dimensional being is
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that you could look back on our three -dimensional world and see everything.
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Nothing would be hidden from you. To you, our layers would be flattened out and easily accessible in the same way
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that we would see all the layers of a 2D being.
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You can walk into the most secure bank in the world and see right through the concrete and steel -encased vaults.
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Your access to the fourth dimension would allow you to just slide through any wall.
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You can just step in and help yourself.
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Safety deposit boxes are now just open trays waiting for you.
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Jewels, stacks of money, gold bars.
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You take what you want.
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But this is all just Dollar Tree stuff.
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Inspired by your newfound powers, you zip over to the Smithsonian Museum of Natural History, walk through the door, melt through the security systems,
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and grab the Hope Diamond.
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It looks good on you.
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Someone shouts at you to stop.
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You've been spotted.
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You might be a four -dimensional being, but you're not invisible.
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Just as a 3D object passing through a 2D world would appear like a line
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that varies in length depending on the width of the object at the point of intersection,
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To us, if a 4D being or object intersected with our world, we'd only see a 3D slice of it.
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We wouldn't be able to see or experience the whole object.
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A part of it would be obscured because we only see in three dimensions.
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So the museum guards aren't even sure what they're seeing.
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They only see a ghostly slice of you moving through their reality, appearing instantly and disappearing just as fast they wouldn't know what was happening.
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Regardless, they'd draw their guns.
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Now, what would a three -dimensional bullet do to a four -dimensional being?
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Even if it happened to hit the slice of you that the guards saw, the damage would be minor,
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like a two -dimensional bullet with absolutely no thickness passing through your three -dimensional hand.
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or you could just step aside and leave the bullet back in three -dimensional space.
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But if for some reason you were caught and the police tried to trap four -dimensional you inside the same cube,
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or in this case jail cell, you would just move in your new four -dimensional direction and slide right through those iron bars.
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You'd be unstoppable.
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Money, access, any restriction anywhere, gone.
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Want to visit the King of England?
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Well, walk right up to him.
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Want to eat lunch in the Oval Office?
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Grab a couple Big Macs and enjoy.
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Another cool feature of your new powers?
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When you look down, you can see everything underground.
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At a glance, you'd be able to map oil deposits deep inside the earth, pick out seams of gold trapped in rock,
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and find every buried treasure that's ever been lost to time and the tides.
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Now, our human society is built upon privacy and access to information, but you could sit in on any conversation,
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reach into any locked drawer, or slide into any high -security setting.
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Corporate plans, state secrets, nothing would be beyond your reach.
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You would instantly be the most powerful being on the planet.
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Slipping in and out of the third dimension, you could change the course of world events any way you wanted.
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But now you're so rich and powerful that material possessions quickly lose all their meaning.
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So you turn your attention to other powerful things that you can achieve with your powers.
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Just like the three -dimensional surgeon could see all of the two -dimensional you, well, you've now harnessed the power of the fourth dimension.
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You could see right through any three -dimensional person.
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Looking through a 3D person, you see every organ, every bone, and even deeper, every process and cell.
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You're able to diagnose at a glance.
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You spot a cancerous tumor, reach in and remove it.
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And you're able to do it without even making an incision.
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To us mere three -dimensional beings, you'd appear as a series of mysterious events.
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Unexplainable phenomena to scientists, ghostly magic to others, and to some, miracles from above.
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From the vantage of your fourth dimension, you spend your days appearing in our world as a friendly ghost,
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leaving behind a trail of medical cures and world -changing interventions.
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Now, despite your powers over our dimension, you'd have to live by the rules of the fourth dimension.
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But there's another dimension.
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Just as it's a mental stretch for us to imagine a fourth dimension,
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it gets increasingly hard to imagine what a fifth dimension would look and feel like.
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But we do know that with every additional dimension,
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you would be entirely, completely changing your ability to see into the previous dimensions.
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Just like a 3D being possesses god -like powers to a 2D being, and a 4D being appears like a god to us,
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a 5th dimensional being would have unimaginable powers inside the 4D world.
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So we can guess that as a 5th dimensional being, you'd be able to look back on the 4th dimension and see it completely.
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Nothing from the 4th dimension would be hidden from you, and you'd be able to trap your four -dimensional self in a four -dimensional cage.
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But going forward from here, we're going to need a bigger brain.
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This is where the limits of our perceptual common understanding end.
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Above the fourth dimension, things get really strange.
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Space isn't necessarily expanding at this point, it's folding in on itself.
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We're getting into the realm of subatomic geometries,
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theoretical shapes and dimensions that some believe could underlie our reality and everything we perceive.
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And some say the progression is this.
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The fifth dimension represents a branching out point between parallel universes.
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Every quantum decision that could go differently does go differently in an adjacent fifth dimensional slice.
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The sixth dimension is the space of all possible histories of all possible universes with the same starting conditions as ours.
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And in the seventh, universes with different starting conditions entirely, different laws of physics, different constants.
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Dimensions 8, 9, and 10 are said to describe the full landscape of every possible universe that could mathematically exist.
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And if you could travel freely through all of them, you'd be a multiverse -jumping super -being.
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You'd travel to the core of the Sun just to see what it was like,
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and then travel to every version of the Sun in every color at every point in time that it ever existed, and didn't exist.
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You'd surf the rings of Saturn, then visit the rings of Earth, and then visit the Universe where every planet in our Solar System is Earth.
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Jump to another galaxy millions of light years away in an instant.
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Geometry and physics become the same thing.
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You can exist anywhere, anytime, any reality.
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It's a breathtaking idea.
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But there's just one problem.
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None of that is what the extra dimensions actually are.
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The reality is far less cinematic, and in its own way, far more strange.
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String theory is a mathematical framework that describes the fundamental fabric of the universe as vibrating one -dimensional strings.
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And this theory requires extra dimensions to function.
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Without additional geometric directions for those strings to vibrate into, the quantum calculations just break down.
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But these dimensions aren't vast cosmic corridors leading to parallel universes.
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They're almost incomprehensibly small, curled up around themselves at scales so tiny they may never be directly observed.
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Not gateways to other realities, but seams in the fabric of space itself.
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Now, if you decide to follow theoretical physics down the rabbit hole, there's even more.
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Bosonic F theory proposes a 28 -dimensional theory.
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And here's the fun part.
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It's 26 directional dimensions and 2 time dimensions.
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Imagine going along your timeline forward and backward and then taking a left.
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These are just our theories today, but there's no telling what the reality actually is.
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Though string theory has a lot of contemporary support, no theory has been completely proven.
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So there could be 30, 5 ,000, or infinite dimensions.
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What would you even be like after transiting through so many dimensions?
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But what does it feel like to be a being with access to infinite dimensions?
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Dimension after dimension, you'd shed the perceptions of the previous one, gaining new perspectives and powers over the previous dimensions every time.
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Now, at the top of the dimensional ladder, you can access everything, every creation, every planet, every timeline, every multiverse,
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and you see and understand everything at the same exact moment.
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The further up the ladder you go, the less like a super being you actually become, and the more you mesh with our concept of reality.
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All outcomes already exist for you.
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There are no choices to be made because they've all already been made.
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And there's no cause, no effect.
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All meaning would cease to exist for you.
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Even the concept of all -powerful, all -knowing doesn't make sense anymore.
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You're more like a fundamental particle at this point, traveling through incredibly complex packets of foldable space.
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Now, the completely multi -dimensional version of you and
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that theoretical zero -dimensional point we talked about at the beginning are somehow the same.
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Strange, isn't it, how everything and nothing meet in a single, unified point.
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You've reached dimensional enlightenment and explored all of space and time.
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Incredibly, though, there's something that exists outside of dimensions and physics,
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and it might be found if we traveled to a time before time began, before the Big Bang.
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But that's a story for another WHAT IF.
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Vocabulaire et conseils d’expression pour cette leçon
Cette vidéo contient 303 phrases et 3987 mots à répéter en shadowing. La partie parlée dure 27:47. Le locuteur parle à un rythme régulier d’environ 144 mots par minute, confortable pour le shadowing. Seuls 81 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant.
Vocabulaire clé de cette vidéo
15 mots de la vidéo à retenir, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| dimension nom | /daɪˈmɛn.ʃən/ | dimension |
| dimensional adjectif | /daɪˈmɛn.ʃə.nəl/ | dimensionnel, de dimension |
| cube nom | /kjub/ | cube |
| trap nom | /tɹæp/ | piège, collet |
| physics nom | /ˈfɪz.ɪks/ | physique |
| timeline nom | /ˈtaɪmˌlaɪn/ | frise chronologique, ligne du temps |
| width nom | /ˈwɪtθ/ | grandeur |
| slice nom | /slaɪs/ | tranche, tronçon |
| layer nom | /ˈleɪ̯ɚ/ | couche |
| string nom | /stɹɪŋ/ | corde |
| slide nom | /ˈslaɪ̯d/ | toboggan, glissoire |
| theoretical adjectif | /ˌθi.əˈɹɛt.ɪ.kəl/ | théorique |
| bullet nom | /ˈbʊlɪt/ | balle, projectile |
| instantly adverbe | /ˈɪnstəntli/ | instantanément |
| disappear verbe | /dɪsəˈpɪɹ/ | disparaître |
Les verbes à particule que vous entendrez
| Mot | Sens |
|---|---|
| pass through verbe | traverser |
| see through verbe | voir à travers |
| break down verbe | tomber en panne |
| come down with verbe | tomber malade, attraper |
| come up verbe | se montrer, sortir du bois |
| leave behind verbe | abandonner |
| look down on verbe | mépriser, regarder de haut |
| open up verbe | ouvrir |
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Phrases conditionnelles if + proposition, will/would + verbe — une condition et son résultat | if they do find it, well, they'll have · If time didn't exist, nothing would happen · if you watched interstellar well you'd know |
| Present perfect have/has + participe passé — une action passée qui compte encore maintenant | you've come · you've ever known · has happened |
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | being wanted · being haunted · are trapped |
Prononciation à surveiller
Le locuteur utilise 86 contractions et formes réduites, comme you're, you'd, we're. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « th »: width /ˈwɪtθ/, theoretical /ˌθi.əˈɹɛt.ɪ.kəl/, thickness /ˈθɪknəs/, sixth /sɪksθ/, mathematical /ˌmæθ(.ə)ˈmæt.ɪ.kəl/
- Les sons « sh » et « zh »: dimension /daɪˈmɛn.ʃən/, dimensional /daɪˈmɛn.ʃə.nəl/, representation /ˌɹɛp.ɹə.zɛnˈteɪ.ʃən/, perception /pɚˈsɛpʃ(ə)n/, shadow /ˈʃædəʊ̯/
- Mots longs — placez bien l’accent: dimensional /daɪˈmɛn.ʃə.nəl/, theoretical /ˌθi.əˈɹɛt.ɪ.kəl/, incredibly /ɪŋˈkɹɛdɪbli/, representation /ˌɹɛp.ɹə.zɛnˈteɪ.ʃən/, fundamental /ˌfʌn.dəˈmɛn.təl/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Répétez phrase par phrase à vitesse normale, en reprenant chacune jusqu’à ce que votre rythme corresponde à celui du locuteur.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme dimension, dimensional, cube.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.