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1·Its sail-like first dorsal fin provides stability while swimming.

帆状的第一背鳍在游动时提供了稳定性。

2·Inside the box, the scientists created a trail with their artificial fish, which was essentially a rubber fin on a stick that created a trail similar to the swimming motion of a real fish.

在那个盒子里，科学家用假鱼设计了游动轨迹，基本上，那是由橡胶鱼鳍形成的，和真正的鱼游轨迹十分相似。

3·Gungans have strong leg muscles for swimming, and are aided by their long fin-like ears.

冈根人腿肌强健，擅于游泳，一对长长的鳍状耳朵也有助于在水中运动。

4·By deploying robots equipped with these fins during test swims, the classes learn how fin size and shape affect swimming performance.

通过部署在测试游泳配备这些鳍机器人，类学习的大小和形状如何鳍影响游泳的表现。

5·Then he saw one on the surface swimming in circles. He did not see the fin of the other.

然后，他看见一条鲨鱼在水面转圈圈，但没有看到另一条鲨鱼的鳍。

6·The important role of tail fin of a fish in swimming is to produce a thrust.

鱼类游动时尾鳍的重要作用是产生推力。