年轻时，你以为世界是一个可以随心所欲生活的地方。但随着年龄增长，你意识到世界是一个你必须按照必须的方式生活的地方。
When you are young, you think that the world is a place where you can live as you choose. But as you get older, you realize that the world is a place where you have to live as you must.
Nothing has really happened until it has been recorded.
置信区间理论提供了一种不同于点估计和假设检验的估计未知参数的方法。
Language is a window into human nature.