Recent space travels have shown that the body needs special exercise in a spaceship to suit the weightless conditions.
最近的宇宙飞行表明，人体需要在宇宙飞船中进行专门训练才能适应失重的情况。
Recent space travels have shown that the body needs special exercise in a spaceship to suit the weightless conditions.
最近的宇宙飞行表明，人体需要在宇宙飞船中进行专门训练才能适应失重的情况。
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