计算复杂性的概念不仅仅是我们能计算多快，还包括理解什么是可以计算的极限。
The concept of computational complexity is not just about how fast we can compute, but also about understanding the limits of what can be computed.
The deeper you go into mathematics, the more you realize how much remains unknown.
诗人是那些感受强烈且表达优美的人。