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。
效法的人如果不仁义,我们就不可以效法他。治理国家,管理人民应当要以人为本,用仁义管理世俗。
晏子春秋
If a man is proud of his wealth,he should not be praised until it is known how he employs it.
"The future belongs to those who believe in the beauty of their dreams."