跟讀練習: Unlimited Resources From Space – Asteroid Mining - 通過影片學習英語口語

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Ah, casually watching a video on YouTube,

on a computer more powerful than anything humanity could build a few decades ago.

執行在一臺比幾十年前人類所能製造的任何裝置都要強大得多的計算機上。

This progress and all the wonderful machines you take for granted are built on a few rare

and precious materials with names like terbium, neodymium or tantalum.

Getting these rare materials from the ground into your devices is ugly.

The mining industry is responsible for air and water pollution and the destruction of entire landscapes.

Dangerous chemicals like cyanide, sulfuric acid or chlorine are used to extract the resources,

harming biodiversity, workers and locals.

And rare resources are also political tools when countries restrict access to them to get their way.

But what if we could replace the mining industry on Earth with a clean process that can't harm anyone?

Well, we can.

All we need to do is look up.

Asteroids are millions of trillions of tons of rocks,

metals and ice, leftovers from the cloud that became the planet 4.5 billion years ago.

They can be as small as a meter or protoplanets the size of entire countries.

Most of them are concentrated in the asteroid belt and the Kuiper belt,

while hundreds of thousands more do their own thing between the planets.

As space travel is becoming more feasible,

scientists and economists have begun looking at the resources found in these asteroids.

Even relatively small metallic asteroids may contain trillions worth of industrial and precious metals like platinum.

And bigger asteroids like 16 Psyche could contain enough iron nickel to cover the world's metal needs for millions of years.

At current market prices, the rare raw materials alone would be worth quadrillions of dollars.

Well, not really, but technically.

For example, there are more than 20 million tons of gold in the ocean's water worth roughly 750 trillion US dollars,

but filtering out the gold would be so expensive that you'd lose money selling it.

Right now, asteroid mining has exactly this problem.

It's too expensive to replace mining on Earth.

Billions of dollars worth of valuable resources in space are worthless if it costs trillions to get them.

What makes it so hard?

The principles behind mining an asteroid are simple.

The basic idea is to choose an asteroid,

move it to a place where it's easy to process,

and then take it apart to turn into useful products.

Unfortunately, all of this collides with fundamental problems humans have yet to solve.

Going to space is expensive.

It costs thousands of dollars in rocket fuel for each kilogram just to reach a low Earth orbit.

Going further out into deep space costs thousands more.

We need cheaper space travel to make asteroid mining profitable.

One solution is to switch from classical rockets to electric spaceships.

We already use electrical rocket engines for many of the space probes on science missions.

In principle, we only need to build bigger ones.

While electrical engines are not powerful enough to fly to space,

they require only a tiny amount of fuel to go very far once they're in space.

This means we don't need to spend a lot of money on fuel,

only to transport fuel into space.

This doesn't solve the whole cost problem,

but it makes it easier to start our first mission.

Now that we have an electric asteroid mining spaceship,

we need to find the right asteroid and get it there.

We've already successfully visited asteroids with space probes and even collected samples.

Still, to make it easier and cheaper,

Our first targets will probably be near-Earth asteroids.

Asteroids that orbit, well, near Earth.

After a few months of travel,

our spaceship finally arrives at our asteroid.

Weirdly formed, littered with small impact craters,

it hasn't changed much for billions of years.

The first thing that needs to be done is to secure the asteroid and stop it from spinning.

There are multiple ways to do this,

like vaporizing material with a laser or stopping the rotation with thrusters.

Once we have a stable asteroid, we need to wait.

Orbital mechanics are complicated, but if you push something in the right direction at exactly the right moment,

you can move very big things with very little force.

So, we wait for exactly the right moment.

Our ship fires its thrusters and nudges the asteroid into a trajectory that takes it near our moon.

The moon is useful because we can borrow its gravitational pull to put the asteroid in a stable orbit around Earth,

which saves even more fuel.

Again, the trip takes months,

but all the time since our ship was launched has not been wasted.

The first space mining and processing equipment has been installed in orbit and is now carefully moving towards the asteroid.

The processor works very differently than on Earth.

Giant mirrors focus sunlight and heat up asteroid rock to boil out the gases.

Grinders break up the dried rocks into gravel and dust,

and centrifuges separate dents from light elements.

Even if we only extract 0.01% of the asteroid's mass in precious metals,

this is still several times more than you'd get from the same amount of ore on the ground.

But what now?

How do we get our precious metals safely back to ground?

There are a few ways,

like loading it into reusable rockets that return to Earth from space.

Or if our processor contains 3D printers,

we can print a faster and cheaper delivery system.

Heat-shielded capsules filled with gas bubbles.

These can just be dropped into the oceans where ships tow them away.

This could be the starting point of humanity's first real steps towards colonizing the solar system.

As our infrastructure and experience grows,

our missions get more and more sophisticated.

Parts and fuel produced on asteroids don't have to be launched from Earth at all.

The first mining operation makes the second one easier and so on.

While the space industry grows and precious materials become cheaper,

eventually we could stop mining on Earth.

Even the idea of toxic mining down here might become something weird and anachronistic,

like having an open fire in your living room.

Landscapes ravaged by pollution will heal,

while the technological wonders we're used to get cheaper and less toxic to make.

None of this is science fiction.

We don't need fancy materials or new physics to make asteroid mining happen.

We could start building this future today.

All we need is an initial push.

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關於本課

在本課中，學習者將通過觀看和分析一個關於小行星採礦的影片，實踐他們的英語聽說能力。影片討論了太空資源的潛力、採礦行業的挑戰以及可持續開發的未來。通過模仿影片中的語音和演講者的語調，學習者將增強他們的發音、流利度和自信心。這是一種有效的雅思口語練習方法，適合使用“看YouTube學英語”的學習者。

關鍵詞彙與短語

小行星 (Asteroid) - 太空中一種岩石或金屬的天體。
珍貴金屬 (Precious metals) - 比如鉑金等高價值的金屬。
採礦行業 (Mining industry) - 從地球中提取資源的行業。
電動飛船 (Electric spaceship) - 使用電動發動機的航天器。
軌道力學 (Orbital mechanics) - 研究天體運動的科學。
提取 (Extract) - 從某物中獲取資源。
重力 (Gravity) - 吸引物體的自然力。
可持續 (Sustainable) - 不對環境造成損害的。

練習技巧

在學習時，模仿（shadowing）是一種非常有效的方式。觀看影片時，請注意以下幾點：

慢動作回放：如果影片的語速對你來說太快，可以將影片速度調低（如0.75倍速），更好地跟上講者語調和發音。
分段學習：嘗試將影片分成幾個部分進行學習，先聽一小段，然後暫停來重複和模仿。這樣您可以集中於每個句子的發音和音調。
注意情感和語氣：講者在談論重要話題時可能會提高音調或改變語速，模仿他們的情感表達能增強您的語言自然度。
紀錄和回放：錄下您的模仿，之後與影片中的原聲相比，分析自己的發音和語調，有針對性地進行改進。

這些練習不僅能提高您的口語技能，還可以幫助您在雅思口語考試中更加自信。通過“shadowspeak”和“shadow speech”，您可以提高英語的流利度和表達能力。

影片中的語法

說話人最常用的結構，並附上影片中的原話：

結構	影片中的用法
被動語態 be + 過去分詞 — 強調發生了什麼，而不是誰做的	are built · are concentrated · be done
現在完成時 have/has + 過去分詞 — 過去發生但與現在仍有關聯的事	have begun · hasn't changed · has not been wasted

什麼是跟讀法？

跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。

影子跟讀法: 閱讀完整分步指南 →

跟讀練習: Unlimited Resources From Space – Asteroid Mining - 通過影片學習英語口語

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關於本課

關鍵詞彙與短語

練習技巧

影片中的語法

什麼是跟讀法？