也可能是其他东西，像壁球拍。

It could be something like this a squash racquet.

youdao

这里有一只壁球拍，这里是质量重心。

And so we have here a squash racquet and we have here the center of mass.

youdao

那…今晚我们一起玩壁球吧，我准备了两个球拍。

So, how about playing squash this evening: I've got two rackets here.

youdao