数学的快乐来自于为理解而奋斗。
每个移民都携带着一个看不见的记忆行李箱。
完成事情的最好方法就是简单地开始。
The most important single central fact about a free market is that no exchange takes place unless both parties benefit.
我非常有耐心,只要最终我能按照自己的方式行事。
No man's knowledge here can go beyond his experience.