学习数学的唯一方法就是做数学。
这是最好的时代,也是最坏的时代;这是智慧的时代,也是愚蠢的时代;这是信仰的时代,也是怀疑的时代;这是光明的季节,也是黑暗的季节;这是希望的春天,也是绝望的冬天;我们什么都有,也什么都没有;我们正走向天堂之路,也正走向地狱之门。
It is our mission as scientists of this generation to ensure Chinese people have enough to eat.
The journey of an artist is never easy, but it’s always worth it.
I am the happiest creature in the world. Perhaps other people have said so before, but not one with such justice. I am happier even than Jane; she only smiles, I laugh.