The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.

The best way to predict the future is to invent it.

我不是说唱歌手，我是一个电影明星。

How far you go in life depends on your being tender with the young, compassionate with the aged, sympathetic with the striving and tolerant of the weak and strong. Because someday in your life you will have been all of these.

被人注视却不被看见，真是件怪事。