每本书都是作者与读者之间的对话。

The arithmetic of modular forms is a key to understanding the deeper structures of number theory.

A writer must be a witness to his or her time, must bear witness to the injustices and the sufferings of the world.

可持续性领导力意味着做出将在20年后受到赞扬的决定，而不仅仅是明天。