That's what happened to Sean Halsted one day when he fell 40 feet to the ground while fast-roping from a helicopter during a training mission at Hurlburt Field, Fla.
2
它们每条都有三英尺多长，游得快时全身猛烈地甩动着，象鳗鱼一般。
They were each over three feet long and when they swam fast they lashed their whole bodies like eels.
3
蝌蚪于是都骚动起来，它们开始沿着一个方向游着，每游几尺就回头看看，就像一条狗在给人引路一样。
The tadpoles got excited, and started swimming in a certain direction, stopping every few feet to look back, just like a dog trying to lead a person on!
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