I have a very simple idea on how to get rich. The first is to spend less than you make, and the second is to invest the difference wisely.
The arithmetic of modular forms is a key to understanding the deeper mysteries of number theory.
爱情中的欢乐和痛苦是交替出现的。
积极性让我们变得更好。通过打开我们的心灵和思想,积极情绪让我们能够发现和建立新的技能、新的联系、新的知识和新的存在方式。