计算复杂性的本质是理解什么可以被有效地计算的极限。

【解释】春夏和暖万物生长，秋冬寒冷万物没有生机。人性情高傲冷漠，福分就淡薄，个性温和热情助人的人，福泽会丰厚。

Every problem in NP can be reduced to the satisfiability problem, which is the cornerstone of computational complexity theory.

People don't buy what you do; they buy why you do it.

我们只有生活一次，所以要活得充实而真实。