摆动速度不是最重要的。

Swinging fast is not the important thing.

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我们推它一下，就会以一定的速度摆动。

We can give it a push, and then it will vibrate at a fixed speed.

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它们摆动着小尾巴用最快的速度在游。

They swim by waggling their small tails as fast as they can.

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它们摆动着小尾巴用最快的速度在游。

They swim by waggling their small tails as fast as they can.

youdao