No one knows why we sleep, but it's certain that we need to.

没有人知道为什么我们要睡觉，但是睡觉是我们必然需要做的事情。

youdao

And why is it that many who have no scruples sleep better at night?

为甚么那么多缺乏良知的人夜里却比别人睡得好呢？

youdao

And why is it that many who have no scruples sleep better at night?

为甚么那么多缺乏良知的人夜里却比别人睡得好呢？

youdao