—— 请按键盘 空白键 开始游戏 ——

可持续发展不再是可选项,而是我们对后代的责任。
"The most important thing a child can learn from a book is that they matter."
No man really knows about other human beings. The best he can do is to suppose that they are like himself.
The reason they call it an American Dream is because you have to be asleep to believe it.
The Langlands program is a vision of how mathematics could be unified in a single framework.