Sea butterfly: a swimming predatory Marine sea snail. They have two wing-like outgrowths (lower right) derived from their foot, which they continually flap to swim through the water.
海蝴蝶：一只正在游动的食肉性海蜗牛。它们拥有像翅膀一样的由足进化而来的侧翼(位于右下方)，并靠拍打侧翼在水中前行。
One day later, the researchers induced stress in the rats through a commonly practiced technique—placing them in a bucket of water in which they had to swim.
第二天，研究人员通过一种通用的技巧来诱导老鼠的应激，也就是把它们放在一个水桶里，在这个水桶当中老鼠为了求生必须游泳。
In open water the ability to swim at a higher stroke rate is a huge advantage as it helps you punch through wave and chop created by other swimmers.
在公开水域高划频是一个巨大的优势，它能帮助你在其他选手造成的波浪中迅速通过。
The shrimp simply crawl up the boulders, while the fish swim through films of cascading water.
虾群缓缓爬上大石头，虾虎鱼则是游过倾泄而下的水层。
The shrimp simply crawl up the boulders, while the fish swim through films of cascading water.
虾群缓缓爬上大石头，虾虎鱼则是游过倾泄而下的水层。
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