The sail of the little boat swung crazily from one side to the other.

这艘小船的船帆发疯似地左右摇晃着。

《柯林斯英汉双解大词典》

The sail looked like the flag of failure forever.

船帆永远像一面失败的旗帜。

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He resolutely hacked off the cable and the sail slipped down.

他果断地砍断了缆绳，主帆滑落了下来。

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An old expression of the sailors that is still heard is to sail under false colors.

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So, in a sense, it says, you know, if you wanted to build a boat that took energy out of the warmth of the air to sail around the world, you can do that.

因此，某种意义上说，它宣称如果你想要造一艘船,通过从空气中获取热量,这是可以做到的。

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He'd learned to sail when he was young, but on the river.

他年轻时就学会了航海,但是在河上

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On the day of the sail, the weather was overcast but they decided to go anyway.

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The sail rushed down and fell into the water, our crew struggling to rescue it.

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