验证不仅仅是发现错误；它关乎理解系统为何以某种方式工作。
学习数学的唯一方法就是做数学。
When you're surrounded by people who share a passionate commitment around a common purpose, anything is possible.
永远不要问理发师你是否需要理发。
Some women choose to follow men, and some women choose to follow their dreams. If you're wondering which way to go, remember that your career will never wake up and tell you that it doesn't love you anymore.