sleep on it 深思熟虑

sleep on it 的字面意思是睡在上面，但实际的意义是深思熟虑。其实也不难理解，当你仔细的考虑一件事情的时候，感觉好像成天就想着这件事情，就好像睡在上面一样。
例如：
It's a major decision and why don't you sleep on it and give me your answer in a day or two.
这是一个很大的决定，为什么不仔细考虑一下，一两天之后给我答复呢？

sleep on it的英文解释是：
take at least a day to think about something before making a decision.

下面是有关sleep on it 的一些例句：
1.
We asked him if he would go home on holiday and he said he would sleep on it.
我们问他是否会在假期回家，他说他会好好考虑的。

2.
I need to sleep on it before I can tell you if I want to rent this apartment.
我要好好考虑一下是要租这套房子。

3.
Have a sleep on it before you do anything.
在采取任何行动之前，请仔细考虑一下。

本文部分参考了ESLMonkeys.com