Unemployment is 9.5 percent in the United States, and Mr.Obama says hiring is usually one of the last areas of a struggling economy to bounce back.

VOA: standard.2009.07.14

Right, this makes a lot of sense because if the entire atom was made up of nuclei, then we would have 100% probability of hitting one of these nuclei and having things bounce back.

因为如果整个原子,都是原子核，那我们就有100%概率,撞到一个原子核并被弹回来,所以如果我们。

麻省理工公开课 - 化学原理课程节选

So, what I'll ask is can you stand up if you had your particle bounce back?

有13个背散射,助教们？

麻省理工公开课 - 化学原理课程节选

The short wave signals bounce off the ionosphere that surrounds the Earth,back to the ground and then back to the ionosphere.

VOA: special.2010.12.08

If you're hit, you might feel pain or bounce back or something.

如果被打了，你会感到疼痛,或是迅速恢复。

耶鲁公开课 - 心理学导论课程节选