To say something is to perform an action， and to perform an action is to do something with words.

一两次接触容易处理好关系，长期在一起关系就难处了。

团队的力量在于思想和经验的多样性。

If you don’t go after what you want, you’ll never have it.

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.