使变量可变很容易。控制恒定的持续时间是诀窍。

The world changes when people decide to do things differently.

"Understanding the limits of computation is as important as understanding the limits of mathematics."

翻译：懂得满足的人不会被利益束缚，注重内心修养的人，即便没有显赫地位也内心坦荡。

我相信梦想的力量。