某一段时间里，美国宇航局的许多实验室都在研究太阳帆。

At one time or another, many of NASA's laboratories have studied solar sails.

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树木为山搭起了框架，在他们上面，延伸着一段大海，而其上的天空，像一面平静的帆，静静地休憩着。

The hills were framed with trees, and beyond them stretched a band of sea on which the sky, like a sail becalmed, rested in all its tenderness.

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海水似乎很浅，但我还是割了一段帆索以防万一，然后双手握紧帆索，轻轻翻过船舷滑了下去。

It seemed shallow enough, and holding the cut hawser in both hands for a last security, I let myself drop softly overboard.

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