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

The world is full of obvious things which nobody by any chance ever observes.

NP完全性不仅仅是一个理论上的好奇心；它对实际计算有着深远的影响。

追求知识是一段永无止境的旅程，每一个发现都为新的问题打开了大门。