一个人能成为什么,他就必须成为什么。这种需求我们称之为自我实现。
在没有其他信息的情况下,参数的最佳估计是其样本值。
When you tear out a man's tongue, you are not proving him a liar. You're only telling the world that you fear what he might say.
The best teacher in life is experience.