The ball will bounce back.

这个球会反弹。

Can it bounce back?

它能反弹吗？

They can tell the distance of various objects by how quickly the sound waves bounce back off them.

他们可以通过声波反弹的速度来判断不同物体之间的距离。

He is young enough to bounce back from this disappointment.

他非常年轻，会从这次失望中振作起来。

He's had a lot of problems, but he always seems to bounce back pretty quickly.

他遭遇过很多挫折，但他似乎总能很快地振作起来。