"A book is a mirror: if an ape looks into it, an apostle is hardly likely to look out."
The best way to learn mathematics is to do mathematics.
这不是钱的问题。而是关于你拥有的人,你如何被领导,以及你理解多少。
Every performance is a new challenge.
真相很少是纯粹的,也从不简单。