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But what do astronauts have to do before they go into space to prepare themselves for weightlessness and spacewalking?
宇航员在进入太空前，要进行哪些训练来适应失重和太空行走呢？
They can practice using a virtual reality headset and special gloves. It’s like playing a computer game that looks and feels like doing a spacewalk.And they also train in a swimming pool!Let’s listen to Major Tim Peake, a British astronaut, talking about the preparation he did for his mission on the International Space Station.
他们会利用虚拟现实的头盔和特质手套进行练习。模拟太空行走就像是在玩电子游戏。他们也会在游泳池中进行训练。我们听听英国宇航员Tim Peake少校讲述他为国际空间站的任务所做的准备训练。
The way we practise spacewalk is in water.Water gives us the neutral buoyancy that we need.So we sink training modules into swimming pools and then practise the spacewalking on them. We wear very specific equipment, a pressurized spacesuit – very difficult to move in actually – it’s hard to bend the fingers, it’s hard to bend your arms – and it really gives you quite a difficult workout.
我们在水中练习太空行走。水可以提供我们需要的中性浮力。所以我们把训练舱沉入泳池，然后在上面训练太空行走。我们穿戴特制的装备——加压的宇航服，穿上它很难移动，很难弯曲手指或弯曲胳膊，练习真的很难。
British astronaut Tim Peake says water gives us buoyancy, which is the ability to float.Floating in space is similar to floating in water, so astronauts practise their spacewalk in swimming pools.
英国宇航员Tim Peake说水可以提供浮力。在太空中漂浮就像在水中浮动，所以宇航员们在泳池中练习太空行走。
Yes. They take to the water and to the air too.Astronauts experience the feeling of weightlessness in planes.A large plane with padded walls flies to high altitude and then goes into a nosedive – or a fast and sudden fall – which creates short periods of weightlessness.
是的，水能产生浮力，空气也能。宇航员在飞机上体验失重的感觉。带有填充壁的大型飞机飞到高海拔时突然俯冲，会造成短时间的失重感。
Fabulous! I’d love to do that!
太棒了！我喜欢这样！
But it’s not all fun and games.Don’t forget that one of the main reasons for being out on the International Space Station is to conduct research.Major Tim Peake is doing scientific experiments such as how to grow plants in space,and what effect radiation and zero gravity have on this process.
这不全是乐趣，也不是游戏。不要忘了去国际空间站最主要的原因是进行研究。Tim Peake少校所做的研究包含如何在太空种植植物，辐射和零重力会在植物培育过程中产生怎样的影响。
Like that film where an astronaut gets stranded – or left behind – on Mars and has to grow potatoes.
就像电影中所说，一位宇航员被困在了火星上，只能种土豆为生。
Yes.
是的。
The film is called The Martian.
这部电影叫《火星救援》。

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