一个词的意义在于它在语言中的使用。

The process of doing mathematics is more important than the result.

Do what you can wherever you are， from wherever you sit in life. Give me your time or your talent your money if you have it.

每一本书都是一次旅行。

最初看似导致怀疑的原则，经过一定程度的追求，会使人回归常识。