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When you see gossamer flying, be sure the air is drying.

当你看到游丝飞舞，一定要确保空气干燥。

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Flying

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The big reason why we don't have space colonies and regular trips to the moon is that flying into outer space is just plain 'hard.' The business of safely transporting people off the Earth is a costly affair that requires a lot of technology.

我们没有太空殖民地，也没有定期去月球旅行的一个重要原因是，飞到外层空间是非常“困难”的。“安全运送人类离开地球是一项耗资巨大的事业，需要大量的技术。

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I love flying planes.

我喜欢坐飞机。

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