Every mathematical problem is a window into a new world of understanding.
这些高墙还真是有点意思。一开始你恨它,然后你对它就习惯了。等相当的时间过去后,你还会依赖它。
The coal industry must deepen supply-side structural reforms and improve supply quality.
La vie est une tragédie pour celui qui sent, et une comédie pour celui qui pense.
I'm a person who likes to be irregular.
The mind can be considered as a physical symbol system.