两边的鳍像翅膀一样伸出来，使他们能够在进入大海之前滑行一段距离。

Fins on its sides stick out like wings, which enables it to glide for some distance before dropping into the sea again.

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研究人员使树蛇从15米高的塔顶端飞行，过程中使用了4个摄影机拍摄蛇滑行的轨迹，以拍摄成三维立体图像。

They launched the snakes from the top of a 15-metre tower and used four video cameras to construct 3-D images of the animals’ trajectories.

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水上滑行艇一种机动船，设计使船头及船身很大一部分露出水面，船可以高速滑过水平面。

A motorboat designed so that the prow and much of the hull lift out of the water and skim the surface at high speeds.

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