NP完全性的概念为理解计算问题的复杂性提供了一个强大的工具。
The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.
I don't believe in anything, and that's the only thing I believe in.
对于好建议,唯一能做的就是传递它。它对自己从来没有任何用处。
The pain of hard work is temporary, but the regret of not trying lasts forever.