跟读练习: Why is NASA sending a spacecraft to a metal world? - Linda T. Elkins-Tanton - 通过YouTube学习英语口语
C2
Somewhere between the orbits of Mars and Jupiter, about 500 million kilometers away from Earth, floats a metallic orb the size of Massachusetts.
32 句
如果句子过短或过长，请点击 Edit 进行调整。
1
Somewhere between the orbits of Mars and Jupiter, about 500 million kilometers away from Earth, floats a metallic orb the size of Massachusetts.
2
That’s no moon... it’s 16 Psyche, one of the most massive asteroids in the solar system.
3
And it is the asteroid our droids are looking for.
4
We humans have managed to send robotic spacecraft to all sorts of environments in space – the gas clouds of Saturn and Jupiter, the icy wastes of Europa, and the rocky dunes of Mars.
5
But Psyche’s surface isn’t just hard rock— it’s heavy metal.
6
The asteroid mostly consists of nickel and iron, by far the largest known body with such a composition.
7
But we don’t yet know what it looks like; our best current radar images show a pixelated smudge.
8
That’ll change in 2026, when an unmanned spacecraft sent as part of NASA’s Discovery Program is scheduled to arrive.
9
So why is NASA so interested in Psyche?
10
Are we going to mine all that metal, or build a giant space magnet?
11
Actually, the real reason is right under our feet.
12
The core of the Earth is thought to consist of a solid nickel-iron center with a molten outer layer.
13
But we’re prevented from studying it up close by 2,800 kilometers of solid rock.
14
The deepest we’ve been able to drill is 12 kilometers.
15
Even if we could go further, the pressure at the core is three million times higher than at the surface, with a temperature of 5,000 degrees Celsius.
16
Simply put, a journey to the center of the Earth is out of the question for now.
17
So scientists have had to resort to indirect ways of studying the core, like measuring earthquake waves that pass through it, or studying minerals thought to have formed there.
18
But what if the best way to study Earth’s inner space is by visiting outer space?
19
After all, we have a pretty good idea of how our planets formed.
20
Dust and gas orbiting our young Sun cooled and collided to form a few thousand miniature bodies we call planetesimals.
21
As these continued to orbit, some combined to grow larger, eventually forming our planets.
22
Others experienced impacts that broke them apart into smaller chunks— the asteroids we see today in the belt between Mars and Jupiter.
23
What makes Psyche so special is that it appears to have been a planetesimal well on its way to becoming a planet, with a rocky exterior surrounding a metal core.
24
But its progress was cut short by a series of hit-and-run collisions with other planetesimals that knocked off the rocky crust until only the core remained.
25
Experiencing that many destructive collisions with no additive ones in between is statistically very unlikely, making Psyche an amazingly rare opportunity to study an exposed metallic core.
26
To do that, NASA’s robotic orbiter will be equipped with an array of advanced instruments.
27
A spectrometer will analyze the gamma rays and neutrons produced when Psyche is struck by cosmic rays.
28
Each element in the periodic table releases gamma rays of specific wavelengths, so these measurements will tell us what elements are found on the surface.
29
A magnetometer will measure Psyche’s magnetic field, allowing us to learn more about how Earth’s magnetic field is generated at its core.
30
And of course, an imager will give us a closer look at the surface than ever before.
31
Visiting a whole new kind of world is exciting enough on its own.
32
But the mission to Psyche gives us a unique chance to discover our own planet’s innermost secrets in an orbit far, far away.
下载应用
Everything you need to speak fluently
AI PronunciationScore every sentence
IPA PracticeMaster every sound
VocabularyBuild your word bank
Vocab GameLearn while playing
关于本课
在这一课中，学习者将会通过观看NASA的太空任务视频来练习英语口语。此次任务聚焦于小行星16 Psyche的探索，这个小行星远离地球，主要由金属成分构成。通过此视频，你将能够提高你的听力理解能力和口语表达能力，尤其在科学和太空探索领域的专业词汇和表达上。
关键词汇与短语
- 金属小行星 (metallic asteroid)
- 太空探测器 (spacecraft)
- 液态外层 (molten outer layer)
- 地震波 (earthquake waves)
- 光谱仪 (spectrometer)
- 磁场 (magnetic field)
- 行星形成 (planet formation)
- 核心 (core)
练习建议
在进行视频学习时，运用影子跟读（shadowing）的技巧将会显著提升你的英语口语练习（英语影子跟读）。由于视频内容的语速较快，建议你首先先观看一次视频，集中注意力在新的关键词汇和短语上。然后，在第二次观看时，通过暂停和重复的方式，慢慢模仿视频中的发音和语调。这样，你能更好地掌握这些专业术语的正确发音，特别是在讨论太空探索和科学话题时，将有助于提高你的雅思口语练习能力。
此外，注意学习者在表达科学概念时的语气和情感，努力让你的语调与视频中的讲解员相似。你可以在想象的场景中运用这些句子，帮助自己在实际交流中更加流利自信。这种方式不仅能练习口语，还能帮助你在科学领域的对话中更加自如，深化理解与表达。通过这些实践，你将能够在各种环境下有效进行沟通，并提升你作为英语学习者的整体能力。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。