英语语法分析

Because the flippers are comparatively thin and blade-like, they are the one part of the leatherback that is likely to become chilled.

棱皮龟的脚蹼比较薄并且呈刀片状，因此，它们就是棱皮龟身体中有可能被冻住的部位。

Last minute our diver was still swimming in the Pacific with flippers, and the next minute he was doing a breaststroke in a fire bucket 300 feet in the air.

前一分钟我们的潜水员还在太平洋里用脚蹼游水，下一分钟他就在300英尺高空的一个救火水桶里做蛙泳了。

Penguins use their wings as flippers.

企鹅把翅膀当作鳍来使用。