NP完全性的概念为理解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 problems.
学习写作的唯一方法就是写作。
Do not anticipate and move without market confirmation—being a little late in your trade is your insurance that you are right or wrong.
我只是一个试图弄清楚这个世界的女孩。
International politics is a ruthless and dangerous business, and it is foolish to expect states to behave according to moral principles.