Pratique du Shadowing: China’s New Invention Could Replace Plastic Forever - Apprendre l'anglais à l'oral avec la vidéo
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309 phrases
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Every year, factories around the world pump out more than 430 million metric tons of plastic.
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That is enough to fill a line of freight trains wrapping around the Earth seven times.
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And here is a number that might surprise you.
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Less than 10% of all the plastic ever made has been recycled.
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The rest ends up in landfills, oceans, and even inside our bodies.
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Scientists have found tiny plastic pieces in human blood, lungs, and arteries.
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A material that took over the planet in just 100 years is now building up inside of us.
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But in October 2025, a small team of researchers at a forestry school in northeast China published a paper
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that made the engineering world stop and stare air.
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They said they had created a new kind of plastic made entirely from bamboo.
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Not a mix of bamboo and oil, not a partial replacement.
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A 100% bamboo material that is stronger than regular plastic, works with existing factory machines,
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and breaks down completely in plain soil within 50 days.
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If you enjoy videos about breakthroughs that change the rules of entire industries, please Please hit the like button, it takes a lot of effort to make these videos,
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and subscribe so you do not miss the next one point.
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The reason this matters goes much deeper than a single new material.
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To understand why engineers are calling this impossible, you need to know how plastic took over the world, why every attempt to replace it has failed,
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and what makes this bamboo discovery so different from everything that came before it.
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The material that conquered the world.
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Think about the phone in your pocket, the container holding your leftovers, the case around your laptop, the dashboard in your car.
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They all share something.
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They are all made of plastic.
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And that is not an accident.
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Plastic got everywhere because it does things other materials simply cannot do.
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It can be melted and poured into any shape you want.
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A bottle, a gear, a car bumper, a tiny clip inside a medical device.
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It costs almost nothing to make.
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It does not rust like metal, rot like wood, or shatter like glass.
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It keeps water out, holds electricity in, and can survive being dropped, heated, or left out in the rain.
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The medical field alone depends on plastic in ways most people never think about.
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Every syringe, every IV bag, every sterile wrapper that keeps germs away from tools during surgery.
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Without plastic, modern hospitals would struggle to function.
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The same goes for food.
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Plastic wrapping keeps bread fresh for weeks instead of days.
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It lets food travel across the world without going bad.
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keeps drinks safe and medicine clean.
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So when someone says, we should just get rid of plastic,
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the real question is, what else can do all of that and still cost next to nothing to make?
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The answer so far has been nothing.
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And that is why replacing plastic is so hard.
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You are not just swapping out one material for another, you are trying to replace something that holds together the entire modern world.
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Getting rid of plastic would be like trying to remove all the nails from every building in a city.
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Everything looks fine until you try, and then it all comes crashing down.
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But there is a catch, and it is a big one.
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The exact thing that makes plastic so useful is the same thing that makes it dangerous.
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It does not break down.
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A plastic bottle you throw away today will still be sitting in a landfill hundreds of years from now.
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It will outlast you, your children, and their children too.
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Instead of disappearing, it slowly falls apart into tinier and tinier pieces.
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Too small to see, but small enough to get into everything.
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Those tiny pieces end up in rivers, in soil, and as scientists are now finding, inside the bodies of living creatures.
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Fish swallow them, birds eat them, and humans breathe them in or consume them through food and water.
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The material we built our world on is now showing up inside us, and nobody fully understands what that means for our health yet.
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So the world is stuck.
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We built everything around a material that never goes away.
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And every year, we make more of it.
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The need for something better is not just about being nice to the planet.
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It is about the fact that plastic is now inside our bodies, and that is a problem that will not fix itself.
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But solving that problem has turned out to be much harder than anyone expected.
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Every single attempt to create a replacement has hit the same wall, and understanding that wall is the next piece of this story.
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Why every previous alternative failed?
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The bioplastics industry has been trying to fix this problem for decades, and almost every time it has failed in the same way.
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The materials they make are either strong but do not break down, or they break down but are too weak,
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or they do both things but cost too much to make in large amounts.
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The most famous bioplastic is called PLA, short for polylactic acid.
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It is made from cornstarch that has been fermented.
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It can break down, but only if you put it in a special facility
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that keeps it above 58 degrees Celsius for weeks at a time.
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If you toss a PLA cup into your garden or a regular trash dump, it will just sit there for years.
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It looks and acts just like regular plastic.
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PLA has other problems too.
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It breaks easily when you drop it, it cannot handle high heat, and it is made from corn,
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which means you are using farmland to grow plastic instead of food.
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Growing corn for plastic
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while people around the world struggle to get enough to eat is not a plan that works for the whole planet.
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Another option is called PHA, which stands for polyhydroxyalkanoate.
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It breaks down more easily than PLA, which is good, but it costs several times more than regular plastic
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because it requires a complex process using bacteria to grow it.
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When something Phaing costs five times as much as what it is trying to replace, companies just do not buy it.
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Pha has been stuck making tiny amounts for special uses for years.
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Starch-based plastics have their own issue.
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They fall apart in water, which means you cannot use them for anything that might get wet.
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Think about how useless a water bottle would be if it melted in the rain.
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acetate is stronger, but you need harsh chemicals to make it, which kind of defeats the purpose of making something green.
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Every single approach has hit the same wall.
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You can make something strong.
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You can make something that breaks down.
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You can make something cheap.
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But nobody could make something that does all three at the same time.
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The real problem was not that people lacked good ideas.
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The problem was chemistry at the deepest level.
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Nobody had figured out how to take a plant material and change its building blocks into something that acts like plastic,
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without adding chemicals that ruin the whole point of going green in the first place.
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Think of it like trying to turn a pile of wood into a steel beam.
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You know the wood is right there, you know steel is possible, But you cannot just bend the wood into a new shape and call it steel.
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You would need to completely change what the wood is at the smallest possible level.
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And nobody knew how to do that with plant materials and plastic.
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That is the wall the team in Harbin, China just broke through.
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And the way they did it is what made engineers around the world stop in their tracks.
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The discovery that changes the equation.
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The research came from a place nobody expected.
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It was not a giant oil company.
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It was not a tech startup in California.
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It was not a secret government lab.
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It came from Northeast Forestry University in Harbin, China, a school that mostly studies trees and forest science.
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The lead researchers were Hai Ping Wu and Dawei Zhao.
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They worked with a team at Shenyang University of Chemical Technology.
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Together, they decided to try something with bamboo that most material scientists had given up on years ago.
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Here is why bamboo was so hard to work with.
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The main building block of bamboo is something called cellulose.
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Cellulose is what gives plants their shape and strength.
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It is in every tree, every leaf, every blade of grass.
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In bamboo, the cellulose molecules are locked together by tiny connections called hydrogen bonds.
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These bonds are incredibly strong.
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They are what let a bamboo stalk stand tall and hold up heavy weight in strong winds.
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But those same bonds are what make bamboo so hard to reshape into something else.
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The cellulose is stuck in place.
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You cannot just melt it and pour it into a mold the way you can with regular plastic.
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If you try to force bamboo into a new shape, it snaps and breaks instead of bending.
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Other scientists had tried to make bamboo plastic before, but they always took a shortcut.
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They mixed ground-up bamboo fibers with regular plastic glue.
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The bamboo gave it some strength, but the plastic glue held everything together.
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The result was half bamboo and half oil.
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It was a mix, not a true replacement, and because it still had that plastic glue in it, it did not really break down in nature.
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Wu and Zhao did something totally different.
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They did not mix bamboo with plastic.
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They turned bamboo into plastic.
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And they did it in two steps that are both simple and clever.
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Step 1.
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They soaked the bamboo cellulose in a special liquid made from zinc chloride and formic acid.
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This liquid does something amazing.
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It breaks apart the hydrogen bonds that hold the cellulose molecules in place, but it does not damage the molecules themselves.
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Think of it like carefully untying a bunch of knots in a fishing net.
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The net is still there.
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The string is still strong.
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It is just not tied up in that stiff shape anymore.
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Step 2.
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They added ethanol to the mix.
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The ethanol acts like a guide.
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It helps the loosened cellulose molecules find each other and connect in a brand new way.
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As they reconnect, they form new bonds that are even stronger and tighter than the ones in the original bamboo.
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The molecules basically rebuild themselves into something better.
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The result is a material that looks, feels, and acts just like regular plastic,
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but it is made 100% from the molecules that were already inside the bamboo.
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No plastic glue was added, no oil-based chemicals were mixed in, no toxic waste was left behind.
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They called the new material BM Plastic, short for Bamboo Molecular Plastic.
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The name tells you both where it comes from and how it was made.
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But a clever name and a good story mean nothing without real numbers to back it up.
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And the numbers are what truly shocked the engineering world.
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The numbers that made engineers stop talking.
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Lots of materials look great in a lab, but most of them fall apart when you try to use them in the real world.
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BM Plastic did not do that.
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Its test numbers were so strong
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that engineers who had spent their whole careers working with regular plastic had to take it seriously.
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A material from a forestry school beating petroleum plastic in strength tests is not something anyone expected.
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The strength numbers were hard to ignore.
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BM plastic can handle a pulling force of 110 MPa.
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That is about twice as strong as PLA, the corn-based bioplastic.
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It is also stronger than high-impact polystyrene, a common plastic used in lots of everyday products.
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To put that in perspective, 110 MPa gets close to the strength of certain types of steel and aluminum used in cars and airplanes.
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This is not some flimsy plant plastic that cracks when you look at it wrong.
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It is a real structural material that can hold real weight.
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It also resists bending very well.
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It scored 6.41 gigapascals in bending tests.
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That is a fancy way of saying it does not warp or sag when you put weight on it.
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In fact, it beat ABS plastic in this test.
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ABS is the tough plastic used in car dashboards and Lego bricks.
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If you have ever stepped on a Lego with bare feet, you know how strong ABS is.
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BM plastic is even better at holding its shape under pressure.
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Heat was another big test.
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BM plastic keeps its shape at temperatures above 180 degrees Celsius.
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The researchers left samples in 100 degrees Celsius heat for seven straight days with no cracking at all.
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They also dunked samples in strong acid, and the surface did not get damaged.
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If you tried that with a PLA cup, it would warp, crack, and fall apart in days.
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BM plastic just sat there, completely fine.
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The material also absorbs a lot of energy before it breaks.
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Scientists call this work of fracture, and BM Plastic scored 80 kilojoules per cubic meter.
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That beats both regular plastic and most bioplastics on the market.
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In plain terms, it can take a real hit without shattering.
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That matters a lot for things like car parts, phone cases, tool handles, and anything that might get dropped or bumped.
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Then came the number that got the most attention from people who care about the environment.
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BM plastic completely broke down in regular soil in about 50 days.
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Not in a special facility, not in an industrial composter,
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just in plain dirt, like a leaf falling from a tree and slowly going back into the earth.
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After about 50 days, the material was basically gone.
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And here is something even more surprising.
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When they recycled it using the same liquid process, the recycled material kept about 90% of its original strength.
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Regular plastic gets weaker every time you recycle it.
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That is why recycled plastic usually ends up in low-value products like park benches.
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BM plastic does not have that problem.
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You can recycle it over and over, and it stays nearly as strong as the day it was first made.
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The research team shared all of their data in a public paper in Nature Communications.
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They showed every test result, every number, and every step of the process.
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They did not ask anyone to just trust them.
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They let the whole world check the work for itself.
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all those numbers would not matter if the raw material could not support making it on a huge scale.
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And that is where bamboo has an edge that almost no other plant can match.
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Why Bamboo is not just any plant.
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The choice of bamboo was not random at all.
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You cannot just swap in any other plant and expect to get the same result.
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Bamboo has a special mix of properties that make it perfect for this job.
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And just as importantly, it has a supply chain that is already built and ready to go.
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Bamboo grows faster than any other plant on earth.
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Some types can grow more than one meter in a single day.
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That is not a typo.
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You can literally watch it grow if you sit still long enough.
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And after you cut it down, it grows right back from the same roots.
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You do not need to plant new seeds, clear new land, or set up watering systems.
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It takes three to five years for a bamboo forest to fully grow back after being cut.
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Compare that to a pine tree, which takes 25 to 30 years to reach the right size for cutting.
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And while a corn crop has to be planted from scratch every single year, bamboo just keeps coming back on its own, over and over.
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Bamboo also produces about five times more plant material per hectare than a regular timber forest.
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It pulls carbon out of the air as fast as, or even faster than, many types of trees,
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and it can grow on land that is not good for regular farming.
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That means it does not take space away from food crops.
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This is a big deal,
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because corn-based bioplastics like PLA get criticized for using farmland that could be growing food instead of plastic ingredients.
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China has the largest bamboo resources in the world.
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There are more than 7.5 million hectares of bamboo forests spread across about 20 provinces.
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The country has over 500 different species of bamboo.
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The bamboo industry in China already makes close to 320 billion yuan every year
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and supports more than 7.5 million farmers who depend on it for their income.
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That means the systems for growing, cutting, moving, and processing bamboo already exist at a massive scale.
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Nobody has to build them from nothing.
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This matters more than you might think.
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Many great new materials fail, not because they do not work in the lab, but because nobody can make enough of them cheaply.
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If your amazing new material needs a rare plant that only grows in one small part of the world,
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you will never make enough to replace hundreds of millions of tons of plastic.
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But bamboo grows all over the world.
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It is found across huge areas of Asia, Africa, and South America.
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The world has about 22 million hectares of bamboo forests in total, spread across many different countries.
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Bamboo is already being harvested at a huge scale for things like building materials, furniture, flooring, paper, and fabric.
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The supply chain for growing it, cutting it, moving it, and processing it is already up and running in many parts of the world.
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That means companies would not need to build a whole new system from the ground up just to start using bamboo plastic.
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So bamboo is one of the very few materials
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that is both great for making strong plastic and available in huge amounts right now.
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It has the performance, the supply, and the farming system all in one package.
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But having the right plant and the right chemistry is still not enough.
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The real question is whether you can actually make this material in regular factories using machines that already exist.
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The factory floor and the race ahead.
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Getting good numbers in a lab is one thing.
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Being able to make something in a real factory with real machines is something else entirely.
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This is where most bioplastics fail.
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They need special equipment that regular factories do not have.
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EM plastic does not have that problem.
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It can be run through injection molding machines, which is how most plastic products in the world are made.
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It can be cut, drilled, and shaped with regular tools.
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It can be pressed into flat sheets or complex 3D shapes.
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The researchers proved this by making lampshades, gears, packing containers, and decorations.
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All on machines that already existed.
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They did not change or upgrade anything.
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This is huge.
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Most new bioplastics need brand new factory lines, special molds, or conditions that normal plastic factories cannot handle.
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That means a company would have to spend millions on new machines before making even one product.
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BM Plastic skips that step entirely.
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If you already have an injection molding machine, you can start making things out of bamboo plastic tomorrow.
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The process also runs at room temperature.
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That might not sound like a big deal, but it is.
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Heating plastic is one of the biggest costs in making it.
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Regular plastic factories use huge ovens and giant heaters to melt their material.
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BM plastic does not need any of that.
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No hot kilns, no pressurized tanks, no giant ovens.
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That saves a huge amount of money on energy alone.
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The chemicals used in the process, zinc chloride and formic acid, are common and cheap.
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The ethanol can be collected and used again.
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Nothing in the process requires rare or expensive materials.
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The researchers estimated that making BM plastic would cost about $2,300 per ton.
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Regular plastic costs about $1,200 per ton.
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That is almost double, which sounds like a problem, but two things narrow that gap.
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First, the cost will drop as production gets bigger and more efficient, the same way it works for every new product.
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Second, the $1200 price for regular plastic does not include the damage it does.
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When you add in the cost of cleaning up pollution, health problems from microplastics, and new government finds,
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the real cost of regular plastic could hit $2,400 per tonne by 2040, according to one study.
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The response to this material has been fast.
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China has been preparing for this moment for years.
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In 2022, the government launched a plan to replace plastic with bamboo.
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In 2023, they released a three-year action plan.
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Steel products are already being made.
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Bamboo fiber tableware exports rose 35% in 2025.
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Bamboo pipes are being installed in cities to replace steel and cement.
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A bamboo drone even flew, with bamboo making up 25% of its body.
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It weighed 20% less than carbon fiber and cost about one quarter as much.
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Meanwhile, global talks about a plastics treaty fell apart in 2024.
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countries could not agree on how to cut plastic production.
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The message was clear.
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Do not wait for rules to fix this.
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The countries and companies that build the replacement first will own the market.
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There are still real challenges.
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BM plastic is rigid, which is great for solid parts, but not for flexible things like plastic wrap or thin bags.
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It needs to last for years in use before it breaks down after disposal, and that part still needs work.
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Scaling up from a lab to making millions of tons is a massive job that takes time and money.
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But no bioplastic has ever combined this much strength, this kind of breakdown, this level of recycling, this kind of manufacturing ease,
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and this level of supply all at once.
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Not one point.
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The world took 100 years to build its dependence on plastic.
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It will not go away overnight.
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But for the first time, there is a material that gives you better performance and sustainability in the same package.
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It does not ask companies to give up something good.
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It offers something better.
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And that is what real change looks like.
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If this video changed how you think about something you touch dozens of times a day
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without ever thinking about where it came from, give it a like and subscribe for more.
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Turn on notifications so you never miss the next one.
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There are related videos on the screen right now if you want to keep watching.
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Here is a question for you.
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If a grass
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that grows one meter a day was sitting right there the whole time as the answer to the plastic problem,
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what other solutions do you think are hiding in nature just waiting for someone to ask the right question?
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Let me know in the comments.
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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale de niveau B2 s’appuie sur la vidéo « China’s New Invention Could Replace Plastic Forever ». Les mots qui reviennent le plus souvent : plastic, bamboo, material, regular. Cette vidéo contient 309 phrases et 3845 mots à répéter en shadowing. La partie parlée dure 26:10. Le locuteur parle à un rythme régulier d’environ 147 mots par minute, confortable pour le shadowing. 85 % des mots font partie des 3 000 mots les plus courants en anglais ; le reste mérite d’être vu avant de commencer.
Vocabulaire clé de cette vidéo
Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| bamboo nom | /bæmˈbu/ | bambou |
| cellulose nom | /ˈsɛljəloʊs/ | cellulose |
| recycle verbe | /ɹəˈsaɪkəl/ | recycler |
| molecule nom | /ˈmɑ.lɪ.kjul/ | molécule |
| researcher nom | /ˈɹiˌsɝ.t͡ʃɚ/ | chercheur, chercheuse |
| corn nom | /ˈkɔːn/ | maïs |
| glue nom | /ɡlu/ | colle |
| melt verbe | /mɛlt/ | fondre, se dissoudre |
| bend verbe | /bɛnd/ | courber, tordre |
| ethanol nom | /ˈɛθ.ə.nɑl/ | éthanol |
| forestry nom | /ˈfɒɹ.ɪst.ɹi/ | sylviculture |
| metre nom | /ˈmiːtəɹ/ | mètre |
| mold nom | /moʊld/ | moisissure f moisi, mildiou |
| wrap verbe | /ɹæp/ | envelopper, emballer |
| chloride nom | /ˈklɔɹˌaɪd/ | chlorure |
Les verbes à particule que vous entendrez
| Mot | Sens |
|---|---|
| break down verbe | tomber en panne |
| go away verbe | partir, s'en aller |
| take over verbe | reprendre |
| break through verbe | percer |
| build up verbe | s'accumuler, s'entasser |
| clean up verbe | nettoyer |
| fall apart verbe | tomber en morceaux |
| figure out verbe | cerner |
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Present perfect continu have/has been + -ing — une action commencée avant et toujours en cours | has been trying · has been preparing |
| Present perfect have/has + participe passé — une action passée qui compte encore maintenant | has been recycled · have found · has failed |
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | has been recycled · can be melted · being dropped |
| Propositions relatives who / which + proposition — une précision sur une personne ou une chose | PLA, which is · water, which means · people who care |
Prononciation à surveiller
- Les sons « th »: ethanol /ˈɛθ.ə.nɑl/, northeast /noːˈθɪjst/
- Les sons « sh » et « zh »: injection /ɪnˈd͡ʒɛk.ʃən/, equation /ɪˈkweɪ.ʒən/, harsh /ˈhɑɹʃ/, partial /ˈpɑɹʃəl/, structural /ˈstɹʌk(t͡)ʃəɹəl/
- Mots longs — placez bien l’accent: ingredient /ɪnˈɡɹiːdi.ənt/, sustainability /səˌsteɪnəˈbɪlɪti/, aluminum /əˈlu.mɪ.nəm/, importantly /ɪmˈpɔɹ.tənt.li/
Les sons difficiles pour les francophones :
- /h/ — il se souffle, il n’est pas muet: hectare /ˈhɛk.tɛɹ/, hydrogen /ˈhaɪdɹəd͡ʒ(ə)n/, harsh /ˈhɑɹʃ/
- /tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: researcher /ˈɹiˌsɝ.t͡ʃɚ/, hydrogen /ˈhaɪdɹəd͡ʒ(ə)n/, injection /ɪnˈd͡ʒɛk.ʃən/, scratch /skɹæt͡ʃ/
- /r/ anglais — langue recourbée, sans frotter la gorge: recycle /ɹəˈsaɪkəl/, researcher /ˈɹiˌsɝ.t͡ʃɚ/, forestry /ˈfɒɹ.ɪst.ɹi/, metre /ˈmiːtəɹ/, wrap /ɹæp/
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 bamboo, cellulose, recycle.
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.