如果你想在数学上取得进步,你必须习惯于不舒服。
The sun himself is weak when he first rises, and gathers strength and courage as the day gets on.
实现明天的唯一限制是我们今天的疑虑。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
学习任何事情的最好方法就是去做。