The whole of life is an act of letting go, but what hurts the most is not taking a moment to say goodbye.

组合数学是不用计数的计数艺术。

A mathematician's work is mostly a solitary pursuit, but it builds on the work of many others.

UNIX非常简单，只需要一个天才来理解它的简单性。

有时候，我们无法改变的事情最终改变了我们。