—— 请按键盘 空白键 开始游戏 ——

Mathematics is a way of thinking, not just a collection of facts.
The peculiar evil of silencing the expression of an opinion is that it is robbing the human race; posterity as well as the existing generation; those who dissent from the opinion, still more than those who hold it.
We still have a long way to go. But we are moving in the right direction.
The hardest thing in life is to know which bridge to cross and which to burn.
The most important quality in a scientist is persistence.
Science is a way of thinking much more than it is a body of knowledge.