一旦鹦鹉开始摆动，它就会高兴地说很多话。

Once the parrot starts swinging, he'll talk a lot happily.

youdao

现在液体在这里，我松开，它开始摆动。

So the liquid now is here, and then I release it, and it will start to oscillate.

youdao

突然，他拉起皮带，并开始摆动狗的头。

All of a sudden, he picks up the leash and begins swinging the dog over his head.

youdao