几何不仅仅是关于形状；它是关于理解我们生活的空间及其内部的关系。

It is not because certain things are difficult that we do not dare;it is because we do not dare that things are difficult.

Mathematics is a living subject, constantly evolving and growing.

过去是一个陌生的国度；他们在那里做事的方式不同。