一个问题如果在计算机上可以快速解决，那么它属于P类问题；如果一个解可以快速验证，那么它属于NP类问题。

The progress of society depends on the efforts of each individual.

求知若饥，虚心若愚。

自由とは、自分自身に責任を持つことだ。

"The true New Yorker secretly believes that people living anywhere else have to be, in some sense, kidding."

A poem is a mirror that reflects the soul.

The challenge of modern physics is not just to find answers but to ask the right questions.

无数的修行法门，最终都归于心灵的修行。