跟读练习: Building a Marsbase is a Horrible Idea: Let’s do it! - 通过视频学习英语口语
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From hostile deserts to lonely islands and the highest mountains, wherever there is space to expand into, humans do so.
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So, it's hardly surprising that we're already making preparations to set foot on Mars
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and to create the first permanent colony outside of Earth, maybe even terraform another planet and turn it into a second blue home. But wait!
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Before we can get to the nice future stuff, we first have to complete the second phase of colonization,
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outpost to prepare the ground for a larger human presence.
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But doing so will be gruesome.
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Even for an expansionist species like us, Mars is extreme.
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At first glance, Mars seems familiar.
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Polar ice caps, large valleys, liquid water under its surface, and a day barely longer than Earth's.
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The ideal place for us to go.
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Unfortunately, Mars is actually a cold, radioactive desert where the ground is poisonous and breathing is impossible.
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Mars is awful.
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You almost certainly don't want to go there.
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The pioneers doing the hard work on Mars will have an intensely stressful life filled with incredibly challenging problems never encountered before.
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But there are plenty of people willing to do that work, and we have the technology to enable them to do it.
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For this video, we will assume there have been prior missions to Mars to scout out a good place for an outpost,
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store resources and equipment, and that there's already a moon base that serves as a hub for Mars missions.
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outpost is the fact that Mars is very energy poor.
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Because of its distance from the Sun, solar power is only 40 % as effective as on Earth.
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But even this weakened sunlight is often obscured for days by enormous dust storms.
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Solar power alone will probably not be enough.
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Alternatives such as wind power and geothermal energy are also unfeasible as there is hardly technology might be the only option.
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Since Mars doesn't have easily accessible radioactive elements, the nuclear fuel needs to come from Earth along with the reactor.
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If we do set it up, it could power our small outpost for the first few years.
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Unfortunately, all that energy won't be very useful if we can't breathe.
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Mars's atmosphere is only 1 % as dense as Earth's and mostly made up of nitrogen and oxygen,
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which comes with more problems.
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Corners and flat walls are weak points, so the habitats will have rounded and smooth shapes to handle the stress of great pressure differences between the interior and exterior.
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The airlocks need to be very airtight and work perfectly every time.
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Without an extensive magnetosphere or a dense atmosphere, half of all radiation coming from space reaches the ground.
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A person on the surface would be subjected to 50 times the radiation that they would be on Earth.
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Three years on the surface of Mars exceeds the radiation dose limits imposed on NASA astronauts for their entire career.
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This increases cancer risks significantly.
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To prevent that, we could shield our habitats with a thick layer of frozen CO2
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that can be harvested directly from the atmosphere.
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Covering the dry ice with a meter of dirt would further increase the level of protection.
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Sadly, this means almost no windows.
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From the inside, most living spaces will be windowless tunnels.
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From the outside, they'll look like burial mounds.
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just enough to be survivable for long periods of time.
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It won't, however, protect anyone who ventures outside.
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So remote -controlled robots will be used for routine work on the surface, while our crew stays inside.
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Staying inside is a good idea for another reason: Mars Dust.
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It's much finer than dust on Earth, so it could find its way into the gears or electronics of our machines.
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Because it's also very dry, it's electrostatically charged, sticking to everything,
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It would be impossible to avoid carrying lots of Mars dust into our habitat and into the lungs of our crew.
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To make this even worse, Mars' soil is filled with very toxic perchlorate salts.
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Constant exposure could be deadly.
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This problem can still be overcome though.
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Space suits, for example, could be made in a way that they never truly enter the base, but stay attached to the outside of the habitats.
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Okay, great.
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them from cancer, we just need to feed them.
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Water is easy to come by if a settlement is positioned near the Martian poles with their thick layers of ice.
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Growing food is a different kind of challenge though.
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Mars' soils are alkaline and lack the vital nitrogen compounds that plants need to grow.
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Before we can grow anything, we will have to decontaminate the soil, which is difficult and expensive.
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Then the soil can be fertilized using recycled All of this will take a lot of time and is very energy intensive.
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So we might use aquaponics to raise fish and plants together, making the astronauts' diets more varied and tasty at the same time.
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This will be an important psychological boost for our overworked crew.
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All of these things don't solve one fundamental problem though.
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Mars has only 38 % of Earth's surface gravity, which could cause muscle wasting,
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bone loss, While this might be solved in the future by setting up rotating living spaces,
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for now our crew has to live with low gravity and exercise a lot to slow the degradation down.
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The crews will probably have to rotate every few years, after being stuck indoors in tight spaces without windows,
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with the same people, performing the same routines day in day out, with little contact from the outside world and a lot to worry about.
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undergo intense psychological screening to make sure they are mentally resilient enough to handle this lifestyle for several years.
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Establishing the first real infrastructure on Mars will be extremely taxing work
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that only a group of very determined and competent people can do.
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Luckily, we have enough of these on Earth.
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And there you have it, a small Mars base that will survive for at least a few decades.
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As from Earth.
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Unfortunately, Mars and Earth are separated by millions of kilometers
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and orbital periods that leave only a narrow travel window every two years.
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If there's an emergency in the colony, Earth wouldn't be able to help until the next travel window opens.
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Helpers may arrive on a planet filled with corpses.
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Settling Mars will be the toughest challenge we have ever faced.
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It will like extreme challenges.
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If we push through phase two of colonization, anything is possible.
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Cities illuminating the dark Martian night, a hub for travel between the planets, industries setting foot in orbit,
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terraforming, a true multi -planetary future.
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Going to Mars is hard but worth it, and if we're lucky, we might be around long enough to see it happening
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and cheer on the people who take on these challenges for the benefit of us all.
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关于本课
在本节中，学习者将专注于提高英语的发音和流利度，特别是与太空探索及火星基地相关的词汇。通过收听视频内容并进行模仿练习，学习者能有效提升自己的口语能力。观看这段关于火星基地建设讨论的视频将为您提供丰富的背景知识，同时增强您在科技和宇宙话题上的对话能力。使用 "看YouTube学英语" 的方法，可以在真实语境中学习和实践新词汇。
关键词汇与短语
- semi-permanent outpost（半永久前哨）
- energy poor（能源贫乏）
- radiation（辐射）
- atmosphere（大气层）
- toxic perchlorate salts（有毒的高级氯酸盐）
- artificial atmosphere（人工大气）
- dust storms（沙尘暴）
- habitats（栖息地）
练习建议
为了更好地掌握口语，建议您在收听视频内容时采用shadowing 技巧。“Shadow speaks”是一种帮助提高语言口音的有效方法。在模仿视频时，请尝试跟随讲话者的语速和语调。这段视频的语速相对适中，因此即使是初学者也能跟上。可以分段练习，先听一小节，暂停后重复，然后再继续。注意音调和语气变化，这些都是提高英语发音的关键。
此外，您可以使用在线资源或软件，在需要时回放视频段落，确保你能够清楚地理解每一个单词。多多尝试，将学习与实际运用结合，能够更快地掌握发音和流利度。同时，不要忘记重复练习与这些主题相关的词汇，以增强记忆和应用能力。
视频中的语法
说话人最常用的结构，并附上视频中的原话：
| 结构 | 视频中的用法 |
|---|---|
| 被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的 | is often obscured · would be subjected · can be harvested |
| 现在完成时 have/has + 过去分词 — 过去发生但与现在仍有关联的事 | have been · have rounded · have ever faced |
| 定语从句 who / which + 从句 — 补充说明人或事物 | anyone who ventures · soil, which is · people who take |
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。