A fish moves its tail from side to side. The rest of its body curves in the opposite direction from its tail.

鱼就是通过用尾巴左右摇摆，身体呈与尾巴相反方向的弯曲来游动的。

youdao

A fish moves its tail from side to side. The rest of its body curves in the opposite direction from its tail.

鱼就是通过用尾巴左右摇摆，身体呈与尾巴相反方向的弯曲来游动的。

youdao