The only way to learn mathematics is to do mathematics.
In scientific work, those who refuse to go beyond fact rarely get as far as fact.
男人是奇怪的东西,而更奇怪的是女人。
度过生活的唯一方法就是笑着度过它。你要么笑,要么哭。我更喜欢笑。哭会让我头疼。