文学是语言的艺术，而语言是情感和思想的载体。
Buying tools: Start by buying the absolute cheapest tools you can find. Upgrade the ones you use a lot. If you wind up using some tool for a job， buy the very best you can afford.
El lenguaje no es sólo un medio de comunicación, es un modo de existencia.
The reward of seeing the joy on the faces of the parents is immense.
In every problem, there is a hidden pattern waiting to be discovered, and it is our duty as mathematicians to uncover it.
科学不仅仅是事实的集合；它是一种思考方式。
有时候你无法独自完成。