质量比数量更重要,一个全垒打比两个二垒安打好得多。
If you do something once, people will call it an accident. If you do it twice, they call it a coincidence. But do it a third time and you've just proven a natural law.
数学中最令人兴奋的时刻是当你发现两个看似不相关的领域有着深刻的联系。