NP中的每个问题都可以归约为可满足性问题，这是计算复杂性理论的基石。

系外行星的研究是一段充满惊喜和挑战的发现之旅，激励着我们不断前进。

The limits of my language mean the limits of my world.

The biggest risk is not taking any risk... In a world that's changing really quickly, the only strategy that is guaranteed to fail is not taking risks.

Human kind cannot bear very much reality.

生活就是当你忙于制定其他计划时所发生的一切。