A program that has not been tested does not work.
建筑应该是沉默的,而非喧闹的。
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。
Fear is such a powerful emotion for humans that when we allow it to take us over, it drives compassion right out of our hearts.
计算的研究对于理解可计算性的极限至关重要。
A man's life is limited, but service to the people is infinite.