没有鱼鳍，鲨鱼无法游泳并慢慢死亡。

Without a fin, a shark can no longer swim and slowly dies.

当人们捕捉鲨鱼时，他们切掉鱼鳍并将鲨鱼扔回海洋。

When people catch sharks, they cut off their fins and throw the sharks back into the ocean.

转变的秘密在于鱼鳍。

The secret to this transition is in the fins.

他的鱼鳍是怎么了？

What's wrong with his fin?

那是一个头顶著一只黑色鱼鳍的男孩！

It was a young boy with a black fin placed on his head!

我们要从鱼鳍后面切掉，切到底，把它放在这边。

We're gonna to go behind the fin and cut through and place this here.

一些鱼翅汤消费者想当然地以为割掉鱼鳍对鲨鱼没什么影响，甚至以为鱼鳍会再生，很遗憾这些看法都是错的。

Some shark fin soup consumers assume that finning doesn't hurt the shark, or that fins grow back; neither is true.

他们把橡胶鱼鳍放在盒子外面，左右摇动。

They operated the fin from outside the box, moving it from left to right or from right to left.

摘要简要介绍了仿生鱼鳍的基本机构和工作原理.

The basic structure and working principle of biomimetic fish fin is briefly introduced.

鹦鹉鱼每次移动鱼鳍或者鼓动鱼鳃都有被鲨鱼发现的危险。

This resting parrotfish risks discovery every time it moves a fin or wafts its gills.