出自汉·桓宽《盐铁论·申韩》，也有说出自《盐铁论·险固》。有所准备就能制服别人；没有准备只能被别人制服。释义：有准备就能钳制住别人；没有准备就要受别人的钳制。
The world is full of people who have never, since childhood, met an open doorway with an open heart.
世界上充满了自童年以来从未以开放的心态迎接开放门道的人。
任何圆的面积等于一个直角三角形，其中一条直角边等于半径，另一条等于圆的周长。
儿童首先发挥功能的是感觉器官。
The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.
我是一个赢家，我会赢。
Good market design aligns individual incentives with social efficiency.
