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.
一个国家的力量在于其人民的团结。
The only thing more painful than being an active forgetter is to be an inert rememberer.
Risk control is the lifeline of a bank.
