解释：货卖完了才知道不足，是由于不懂得计量；事情结束了才知道有余，是由于不懂得调节。

The poet is a man who plants a tree and then sits in its shade.

"In the end, we are all alone, and that is the most terrifying truth of all."

我唯一知道的是我一无所知。

家人团结，才能无往不利。  

浪费是设计缺陷，而不是不可避免的结果。