"The truth is rarely pure and never simple."
真相很少是纯粹的,也从不简单。
经济学家的角色既是科学家,又是工程师。
The only way to get rid of a temptation is to yield to it.
学习新编程语言的最好方法是用它编写程序。
If you don't believe in yourself, no one else will.