学习数学的最好方法就是做数学。
我本人是个乐观主义者,因为做别的貌似没什么用。
凡是大国之所以不攻打小国的,必定是由于这个小国粮食充足,城郭修筑坚固,上下和谐一心。
我不创造,我发现。
The decay of political institutions is often a result of the inability to adapt to changing circumstances, leading to rigidity and eventual decline.