Mathematics is the language of the universe, and through it, we can understand the fundamental principles that govern our world.

让我最不爽的一件事：一天路过银行时，看到一则广告，力劝大家将自家房子作二次抵押，以此贷款去旅游。这几近邪恶。

The peculiar evil of silencing the expression of an opinion is that it is robbing the human race； posterity as well as the existing generation； those who dissent from the opinion， still more than those who hold it.

改变是好事。

你不尝试，就100%会错过。