The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.

The past is never truly past until it has been fully understood.

宏观经济政策的目标应该是稳定经济，而不是微调经济。

I want to put a ding in the universe.

I'm not a rapper, I'm a reading legend.

模糊集的概念提供了一种自然的方式来处理那些不精确性源于缺乏明确定义的类别成员标准的问题。