真实世界是最抽象的东西。
I'm not trying to be sexy or anything like that. I'm just being myself.
In mathematics, you don't understand things. You just get used to them.
A book can be a friend, a teacher, and a doorway to another world.
Every object has potential; it's our job to unlock it.
法律的目的不是废除或限制自由,而是保护和扩大自由。