上帝创造了体；表面是魔鬼发明的。

A minute's success pays the failure of years.

The world is a language we have forgotten how to speak.

The most beautiful words in the English language aren't "I love you" but "it's benign."

Learn how to tie a bowline knot. Practice in the dark. With one hand. For the rest of your life you’ll use this knot more times than you would ever believe.

函数是一种对应规则，通过它当给定任何东西（作为参数）时，可以获得另一个东西（该参数的函数值）。

计算复杂性的研究告诉我们，有些问题本质上是困难的，无论我们的算法多么聪明。