Some bounce out at a slightly different angle than they entered.

弹跳出一些比他们略有不同角度进入。

"A universe filled with matter will contract down to a small—but finite—size and then bounce out again, giving us the expanding cosmos we see today, " he says.

“一个充满物质的宇宙会收缩至一个小——但有限——的尺寸然后又反弹开，产生我们今天看到的膨胀的宇宙，”他说。

This is great if you instantly need to be on the move after a nap, and you can bounce out of your sleeping state and jump into work feeling refreshed and energised.

如果你需要在瞌睡之后马上清醒，这是很好的方法，你可以马上从睡眠中醒来精神百倍地投入工作。