تدريب Shadowing: The Comprehensive Guide to Nuclear: What You Need to Know - تعلم التحدث بالإنجليزية عبر الفيديو
اختر وضع التدريب
كل وضع يفتح غرفة تدريب بملء الشاشة.
186 جمل
إذا كانت الجمل قصيرة أو طويلة جدًا، انقر على Edit لتعديلها.
1
Nuclear energy is one of the most complex and mysterious topics out there.
2
In this video, I'll tell you everything you need to know about nuclear power and some of the controversy around it.
3
Coming up!
4
Nuclear energy is one of those topics that everyone seems to have an opinion on.
5
What it is, if it's a solution to climate change, and whether it's even safe or not.
6
But how well do we actually understand it?
7
There's a lot of conflicting and confusing information surrounding nuclear power, So let's get to the bottom of it by covering what exactly do we mean when we say nuclear power,
8
how is it used, the main advantages and disadvantages, and finally what is its place in the world today.
9
First, to say anything about nuclear power we need to understand how we got here, because if we don't know where we've been it's going to be really hard to know where we're going.
10
So let's start with that.
11
Nuclear power today is a result of work by scientists during World War II.
12
The main effort was on developing an atomic bomb, which makes sense at the time.
13
In the US, this was the Manhattan Project
14
that led to the first controlled nuclear reactor being built under a football field in Chicago in 1942, and then followed by the first atomic explosion,
15
the Trinity Test, in New Mexico in 1945.
16
It was also used in military applications like submarines, with the first one going out to sea in 1954,
17
whereas a compact power source that did not require oxygen really made sense.
18
Now, the submarine will be important for later so we'll come back.
19
After the end of World War II, use of nuclear energy to produce electricity was first demonstrated in Idaho in 1951, connected to the electrical grid in the Soviet Union in 1954,
20
and the first commercial nuclear station started in the UK in 1956.
21
But all of these reactors were relatively small, barely enough to power a small town, and most were unique designs,
22
which reflected the world's attitudes towards experimenting and trying new things with atomic energy.
23
Commercial nuclear power, however, took off in the US, the Soviet Union, in the UK, and elsewhere in the late 1950s and 60s, with the plants becoming larger and more powerful.
24
At this time, essentially all the designs were related to or derived from each country's weapons program in some way.
25
In fact, the United States government, under President Dwight Eisenhower, encouraged private development of nuclear energy through the Atomic Energy Act of 1954
26
and his Atoms for Peace initiative, which was intended to to emphasize the civil uses of nuclear energy
27
and allowed for declassification of nuclear technology that had been researched by the military during the war.
28
Scientists and politicians were optimistic that nuclear power would be easy to introduce on a large scale, with one official stating atomic power will provide electrical energy too cheap to meter.
29
I know, sounds crazy.
30
So as you might have noticed, you still have an electric utility bill, so it didn't work out.
31
It turned out the technology was complex and risky for private companies.
32
Add to that a growing number of minor concerns like safety and proliferation of nuclear weapons, and nuclear power was not exactly looking to be as golden as it once did.
33
Later in the 1970s, the oil crisis had a significant effect on countries that had no oil, like France and Japan, which led them to invest heavily in nuclear power.
34
France went all in, converting the vast majority of their electrical grid to nuclear power, accounting to 70-80% of their electrical generation, which is still true today.
35
In the US, also facing these shortages led to the construction of dozens of additional reactors, with the busiest time for new plants being built in the late 1970s.
36
However, this enthusiasm was short-lived.
37
Several accidents, including a partial meltdown at Three Mile Island in the US in 1979,
38
and a completely uncontrolled explosion at Chernobyl in Ukraine in 1986,
39
really turned public opinion away from nuclear power and many plants under construction were cancelled.
40
And as it turns out, by sheer coincidence, the movie China Syndrome, about a fictitious plant melting down in California,
41
was released just 12 days before the accident at Three Mile Island.
42
12 days.
43
People were understandably scared of something outside of their control.
44
Radiation couldn't be seen, could penetrate the walls of their home.
45
And so it wasn't just nuclear bombs.
46
People living near nuclear plants had genuine concerns, and understandably so.
47
After those two accidents, construction of new plants largely stopped, but the majority of the plants that were already built continued to operate in the background.
48
After all, it doesn't make sense to shut down a few billion dollar asset
49
if it's still working and people need the electricity.
50
Today, there are over 400 of these reactors operating worldwide, although the majority of them have been operating longer than their originally intended lifespans.
51
The reason for this is somewhat complex, so we'll go through that at another time.
52
But the important thing today is that nuclear power provides around 10% of the world's electricity.
53
So how does it work?
54
Well, nuclear physics is obviously going to be a complicated subject, and that's why there are thousands of brilliant scientists all over
55
the world who work every day on improving our understanding through research and experiments.
56
So this is going to have to be an extremely simplified explanation of how nuclear physics works.
57
This might sound basic, but this is just so we can all have a common understanding.
58
Atoms, which are the smallest particles which make up any element like hydrogen, oxygen, aluminum, lead, gold, or uranium,
59
have three components, protons, neutrons, and electrons.
60
The protons and neutrons are in the center of the atom, or nucleus, and the electrons orbit around outside the center.
61
Remember, atoms are super small and can only be seen with specialized scientific equipment.
62
Some elements, like hydrogen, are relatively small and lightweight compared to other atoms, containing only one proton and zero to two neutrons.
63
Uranium, on the other hand, has over 200 protons and neutrons combined, making an not only very heavy, but less stable.
64
If you think of it like building a tower, the higher you go, the more complex the structure becomes and the easier it is to knock over.
65
Uranium atoms, it turns out, are just like a tall, unstable tower.
66
If we throw something at it, it'll collapse.
67
And since these are atoms, we obviously need to throw very small things at them, like a single neutron.
68
When it hits the uranium nucleus, it becomes unstable and breaks apart into two smaller atoms, a whole bunch of energy and heat, and a few more neutrons.
69
It's these neutrons that can then hit other uranium atoms and the cycle will continue, starting the nuclear chain reaction, or fission.
70
In a nuclear bomb, the goal is to try and make this reaction happen as quickly as possible, within less than a second, so that as much energy can be released as possible and make a big explosion.
71
In a nuclear power plant, the reaction is done much, much more slowly, over months or years, to produce a sustainable level of heat that can be used to make electricity.
72
And since we can pack a lot of atoms into a single nuclear reactor, this allows them to make so much energy over such a long period of time.
73
There are other types of reactions that can use different elements, but worldwide uranium is by far the most popular and used in over 99% of power plants, so that's what we'll focus on here.
74
Okay, now that we've got the basics of nuclear physics out of the way, we can do something with that heat.
75
Designers and engineers can take that heat and use it to make electricity.
76
And this is where a nuclear power plant actually isn't that different from most other power plants.
77
If I were to show you this picture, what kind of power plant would you guess it is?
78
If you said nuclear, that's okay, but it's actually a coal plant.
79
The large cooling towers most people associate with nuclear power can be found on many plants, and it has absolutely nothing to do with it being nuclear or not.
80
It has to do with whether or not it is using air or water and what method of cooling it uses.
81
Fundamentally, most power plants are basically the same, regardless of the type.
82
They use some sort of heat to boil some water and turn an electrical generator.
83
The heat source could be anything.
84
Coal, oil, natural gas, nuclear, and sometimes solar.
85
Nuclear energy is just another way to boil water and make electricity.
86
Since the only real difference between a nuclear power plant and a coal plant is the source of heat, let's talk about the different types.
87
In a coal or gas plant, they burn fossil fuel directly to heat up the water and make electricity.
88
In the nuclear plant, they use the chain reaction with uranium to make the heat.
89
And like anything else, there are many different designs on how to produce that heat.
90
So you remember our nuclear submarine from earlier?
91
Well, after the reactor was designed for the sub, they were looking for a way to use that on land to make electricity.
92
And since they already had a working concept and design from the submarine, all they had to do was scale it up.
93
And you know what?
94
That's exactly what they did.
95
This is what's known as a pressurized water reactor.
96
It's not particularly complex or efficient, but it is available, it works, and they're not too expensive.
97
And so that basic idea has become the most popular design by far, accounting for almost 70% of the operating reactors worldwide.
98
There are, of course, more efficient and improved designs.
99
After all, there have been a lot of technological advances since the 1950s designs that are smaller, more efficient, use better fuel and materials.
100
So why don't we see these new designs being built?
101
The main problem is risk.
102
Let me give an example.
103
If you think about it, a decade ago, electric cars were available and arguably better in many ways compared to what was already on the market.
104
Yet outside a few places, not many people were buying them.
105
Why not?
106
Well, people just aren't willing to take the risk
107
and invest what could be a large portion of their savings on a new, immature technology with only modestly improved benefits.
108
Even today, electric cars are more widely accepted, but are still being outsold 10 to 1 compared to regular fossil fuel vehicles.
109
But the idea is similar.
110
The same is true for a company or even a government looking to buy a nuclear plant.
111
There are new, fantastic designs that are great on paper, but no one has built them.
112
And if you're going to spend 10 billion dollars on an infrastructure project, you really need to be sure that it's going to work and not end up being a giant waste of money.
113
And so, you do the sensible thing and build what you know will work, even if it's not the best.
114
So why would a company or government choose or not choose nuclear power?
115
Let's take a quick look at some of the pros and cons.
116
The biggest single advantage of nuclear energy is its density.
117
It is literally thousands of times more compact than fossil fuels.
118
Only 10 grams of uranium in a reactor can produce as much energy as a whole metric ton of coal.
119
Compared to fossil plants, which need a nearly constant supply of gas or coal, nuclear plants can operate with the same uranium for months or even years at a time
120
and can actually store additional years worth of uranium on site, which really improves the reliability of their fuel supply if there was to be some sort of, say, oh I don't know, interruption.
121
The second main advantage is that, despite what many people think, nuclear power is actually among the safest forms of electricity generation,
122
similar to renewables, and even after considering accidents like Chernobyl and Fukushima.
123
This is because a relatively large amount of energy comes from a small number of plants.
124
Once constructed, nuclear plants tend to last a very long time, 40 to 60 years or more.
125
And, like wind, solar, and hydropower, nuclear does not emit any substantial air pollution.
126
In fact, a 2013 study by NASA showed
127
that using nuclear instead of fossil fuel plants had prevented 1.84 million deaths due to avoiding air pollution.
128
The third advantage is that nuclear substantially reduces CO2 emissions.
129
Even after considering construction, mining the uranium, decommissioning old plants, it is still similar to wind and solar, and certainly significantly less than fossil fuel plants.
130
Since one of the world's goals is to reduce CO2 emissions, nuclear power provides an energy dense, reliable, and relatively safe way to do that.
131
Worldwide, electricity is already one of the largest contributors to CO2, so increasing nuclear can certainly play a big part in reducing that.
132
Now obviously nothing is free, and there certainly are some downsides when it comes to using nuclear power.
133
The first one are accidents.
134
We'll cover these more in another video, but there have been many, although most don't rise to the level of notoriety of Chernobyl or Fukushima.
135
However, limiting the list to those with multiple fatalities or significant financial costs still produces around 30 accidents worldwide since the 1950s.
136
And these are large-scale incidents that have caused real damage and caused people's lives.
137
And despite the industry's best efforts, they still seem to occur every few decades.
138
But didn't we just say that nuclear was super safe, Like wind and solar?
139
Well, yes, technically, because statistically it is.
140
However, it is still susceptible to these large incidents like Fukushima that grab a lot of attention.
141
You know, statistically, flying is much safer than driving, yet people believe they are at risk on a plane because a single air crash can kill hundreds of people.
142
And of course, when people are driving, they think that they are in control, even if they cannot control all the other drivers or hazards on the road.
143
Nuclear power has the same sort of perception, It is outside people's individual control and is highlighted by a big accident every couple of decades.
144
Okay, so even if the safety argument is maybe a little bit uneven, the second big disadvantage is very, very real, and that's the cost.
145
There is no way around it.
146
Even after decades of experience, nuclear power is an enormously expensive way to generate electricity.
147
All things considered, nuclear power is getting more expensive, while wind and solar have declined dramatically, especially over the last decade.
148
Nuclear plants are big and require a lot of money up front to build.
149
Add to that construction times that are uncertain, taking as many as 10 years or more to build a single unit.
150
Nuclear power has become so difficult and so expensive that very few western countries are willing to pursue any large-scale construction.
151
The same, however, is not true in Asia, where countries like Russia, South Korea, and China are able to successfully build reactors at much more competitive prices.
152
In fact, around half of all new reactor startups in the past few years have occurred in China, while other countries are shutting them down.
153
The third disadvantage is nuclear waste.
154
With the current design of nuclear plants, a significant amount of nuclear waste has built up after 70 years of operations.
155
The most dangerous of which is the spent uranium fuel, which is leftover uranium that had the majority of its usable energy extracted, and it'll be dangerous for thousands of years.
156
Almost 400,000 tons of waste has been produced, and the majority of it sits around at the power plants that actually made it.
157
One positive aspect of nuclear waste, though, is that it is solid and dense and easy to keep track of.
158
It doesn't blow into the wind like coal plants for people to breathe, but it still will be with us for a very long time.
159
And if these disadvantages weren't enough, we haven't even included the risks of governments or terrorists diverting nuclear material to build weapons,
160
or the overall complexity of operating and maintaining nuclear plants with the sometimes hundreds of different regulators and regulations that are required.
161
It is a complicated business to be in.
162
So with all of that in mind, is nuclear energy renewable?
163
The short answer is, in its current form, no. There's only so much uranium to dig out of the ground and eventually it's going to run out.
164
But probably not anytime soon, at least not in our lifetimes.
165
At the current rate of consumption, the world has enough uranium to last over 200 years.
166
Although, like mining anything else, not all of it will be easily accessible or cheap to get out.
167
And if we build more nuclear plants similar to the ones we already have, that number is going to reduce further or just make it more expensive.
168
Still, even if there are 100 years of easily accessible and relatively cheap uranium in our future, it's going to run out.
169
More advanced reactor designs can significantly extend this number into thousands of years, but as I mentioned before, they are largely untested and nobody is willing to build them on a commercial scale.
170
So what is nuclear energy's place in the world?
171
It provides a large, reliable source of low-carbon electricity.
172
It works regardless of the weather or time of day or season and can be defended against supply interruptions.
173
It is statistically very safe, but does seem to suffer from large public accidents every few decades.
174
It produces highly toxic waste, but the amount is very small and easy to track.
175
A large number of the existing plants have operated longer than originally designed, and new ones are almost prohibitively expensive, at least in the West.
176
New designs are more efficient and easier to construct, but haven't been done so on a large scale.
177
There is no clear answer, and it will often depend on each country's access to resources and priorities.
178
Some countries have decided to phase out nuclear power, while others have embraced it as a means to diversify their energy and fight climate change.
179
Nuclear power will likely be with us for at least another 100 years.
180
And unless there are changes in the technology being used, government policies, or public opinion, It will likely continue to be providing about the same amount as it does now,
181
working alongside other low-carbon sources like wind, solar, and hydro.
182
So, does nuclear energy have what it takes to power our world, or is it just an outdated technology better left in the past?
183
Click on these videos to hear both sides of the argument.
184
If you found this useful, please consider liking or subscribing, all that good stuff.
185
It really helps me know what to do to improve the content of this channel.
186
And thanks for watching.
تنزيل التطبيق
كل ما تحتاجه للتحدث بطلاقة
تقييم النطق بالذكاء الاصطناعيتقييم كل جملة
تدريب IPAأتقن كل صوت
المفرداتابنِ رصيدك من الكلمات
لعبة المفرداتتعلّم أثناء اللعب
FOR YOU
فيديو موصى به
C265
46 جمل
Nuclear Energy Explained: How does it work? 1/3
IELTS PrepTOEFL PrepUniversity Students
C11
28 جمل
What is Nuclear Medicine | Dr. Paulien Moyaert
IELTS PrepTOEFL PrepUniversity Students
C15
101 جمل
The Most Extreme Explosion in the Universe
IELTS PrepTOEFL PrepUniversity Students
C12
76 جمل
The Nucleus: Crash Course Chemistry #1
IELTS PrepTOEFL PrepUniversity Students
C16
32 جمل
Anti-matter & nuclear weapons: Why technology is always a double-edge sword | Don Lincoln
IELTS PrepTOEFL PrepUniversity Students
C13
23 جمل
Coal, Oil & Gas Hyrdocarbons | Organic Chemistry | Chemistry | FuseSchool
IELTS PrepTOEFL PrepUniversity Students
C168
44 جمل
Why is it Hot Underground?
IELTS PrepTOEFL PrepUniversity Students
C15
53 جمل
Meeting scene - HBO Chernobyl 2019 | Episode 02
IELTS PrepTOEFL PrepCambridge Exam Prep
B122
6 جمل
Nuclear Power #nuclear power ear
IELTS PrepTOEFL PrepUniversity Students
C15
28 جمل
How to Blow Up the Earth - Nuclear Engineer Reacts to Zack D. Films
IELTS PrepTOEFL PrepUniversity Students
C16
92 جمل
Unit 16 | The energy crisis | Vocabulary for IELTS | All English 4U
IELTS PrepTOEFL PrepUniversity Students
B25
50 جمل
Recreating the Nuclear Boy Scout Reactor
IELTS PrepTOEFL PrepUniversity Students
المفردات وملاحظات التحدث لهذا الدرس
هذا الدرس في المحادثة بمستوى C1 مبني على الفيديو “The Comprehensive Guide to Nuclear: What You Need to Know”. أكثر الكلمات تكرارًا في الفيديو: nuclear, plant, energy, uranium. يحتوي هذا الفيديو على 186 جملة و3209 كلمة للتدرب على الترديد. مدة الكلام 16:13. يتكلم المتحدث بسرعة، نحو 198 كلمة في الدقيقة، لذا ستسمع كثيرًا من وصل الكلمات واختزال الأصوات. 87% من الكلمات ضمن أكثر 3,000 كلمة شيوعًا في الإنجليزية، ويُستحسن مراجعة الباقي قبل البدء.
أهم المفردات في هذا الفيديو
أصعب 15 كلمة في الفيديو، مع النطق والمعنى:
| الكلمة | النطق | المعنى |
|---|---|---|
| uranium اسم | /ˌjuː.ˈɹeɪ.ni.əm/ | يُورَانِيُوم, أُورَانِيُوم |
| reactor اسم | /ɹiˈæktɚ/ | مُفَاعِل |
| atom اسم | /ˈætəm/ | ذَرَّة |
| neutron اسم | /ˈnu.tɹɑn/ | نْيُوتْرُون, نُوتْرُون |
| fossil اسم | /ˈfɑsl̩/ | مُسْتَحَاثَة, أُحْفُورَة |
| atomic صفة | /əˈtɑː.mɪk/ | نَوَوِيّ, ذَرِّيّ |
| proton اسم | /ˈpɹoʊ.tɑn/ | بْرُوتُون |
| disadvantage اسم | /ˌdɪsədˈvæntɪd͡ʒ/ | سَيِّئَة |
| submarine اسم | /sʌb.məˈɹiːn/ | غَوَّاصَة |
| interruption اسم | /ˌɪntəˈɹʌpʃən/ | مُقَاطَعَة |
| nucleus اسم | /ˈnuː.kli.əs/ | نَوَاة |
| boil فعل | /bɔɪ(ə)l/ | غَلَى |
| hydrogen اسم | /ˈhaɪdɹəd͡ʒ(ə)n/ | هَيْدُرُوجِين, هِيدْرُوجِين |
| dense صفة | /ˈdɛns/ | كَثِيف, غَلِيظ |
| decommission فعل | /diːkəˈmɪʃən/ | يَلٰجَأَ |
الأفعال المركبة التي ستسمعها
| الكلمة | المعنى |
|---|---|
| run out فعل | نَفِدَ |
| come back فعل | عَادَ, رَجَعَ |
| come up فعل | طَلَعَ |
| heat up فعل | سَخَّنَ |
القواعد في هذا الفيديو
أكثر التراكيب التي يستخدمها المتحدث، مع العبارات نفسها من الفيديو:
| التركيب | في الفيديو |
|---|---|
| المضارع التام have/has + اسم المفعول — حدث ماضٍ ما زال له أثر الآن | we've been · has become · have been |
| المبني للمجهول be + اسم المفعول — التركيز على ما يحدث لا على من يفعله | being built · was intended · had been researched |
| جمل الوصل who / which + جملة — معلومة إضافية عن شخص أو شيء | bomb, which makes · initiative, which was · generation, which is |
نطق يحتاج إلى انتباه
يستخدم المتحدث 27 من الصيغ المختصرة، مثل don't, we'll, didn't. انطقها بصيغتها القصيرة كما تسمعها.
- أصوات “sh” و“zh”: interruption /ˌɪntəˈɹʌpʃən/, emission /ɪˈmɪʃ.ən/, declassification /diːˌklæsɪfɪˈkeɪʃən/, decommission /diːkəˈmɪʃən/, fictitious /fɪkˈtɪʃəs/
- الكلمات الطويلة — انتبه لموضع النبر: uranium /ˌjuː.ˈɹeɪ.ni.əm/, disadvantage /ˌdɪsədˈvæntɪd͡ʒ/, statistically /stəˈtɪs.tɪ.kə.li/, interruption /ˌɪntəˈɹʌpʃən/, declassification /diːˌklæsɪfɪˈkeɪʃən/
أصوات يجدها متحدثو العربية صعبة:
- /p/ — ليس /b/: انطقه مع نفخة هواء: proton /ˈpɹoʊ.tɑn/, interruption /ˌɪntəˈɹʌpʃən/, compact /kəmˈpækt/, lifespan /ˈlaɪf.spæn/, pressurize /ˈpɹɛʃəɹaɪz/
- /v/ — ليس /f/: مع اهتزاز الأوتار الصوتية: disadvantage /ˌdɪsədˈvæntɪd͡ʒ/, diversify /daɪˈvɝ.sə.faɪ/, divert /daɪˈvɝt/, derive /dɪˈɹaɪv/, uneven /ʌnˈivən/
- تتابع الصوامت — لا تضف حركة بينها: proton /ˈpɹoʊ.tɑn/, statistically /stəˈtɪs.tɪ.kə.li/, unstable /ʌnˈsteɪ.bəl/, dense /ˈdɛns/, construct /ˈkɑn.stɹʌkt/
كيف تتدرب بهذا الفيديو
- استمع إلى الفيديو كاملًا مرة واحدة دون أن تتكلم، ودوّن الكلمات التي لا تعرفها.
- ابدأ بسرعة 0.75×، وردّد جملة جملة، ثم عُد إلى السرعة العادية عندما يصبح الأمر سهلًا.
- سجّل صوتك وقارنه بالأصل، مع الانتباه إلى كلمات مثل uranium, reactor, atom.
ما هي تقنية التظليل الصوتي؟
التظليل الصوتي (Shadowing) تقنية تعلم لغة مدعومة علمياً، طُورت أصلاً لتدريب المترجمين الفوريين المحترفين. الطريقة بسيطة لكنها قوية: تستمع لصوت إنجليزي أصلي وتكرره فوراً بصوت عالٍ — كظل يتبع المتحدث بتأخير 1-2 ثانية. تُظهر الأبحاث تحسناً كبيراً في دقة النطق والتنغيم والإيقاع وربط الأصوات والاستماع والطلاقة.