What's too much for one, just rignt for two, but nothing at all for three?

对一个人来说太多，两个人就正好，三个人就什么也不是了。这是什么呢？

youdao

What's too much for one, just rignt for two, but nothing at all for three?

对一个人来说太多，两个人就正好，三个人就什么也不是了。这是什么呢？

youdao