—— 请按键盘 空白键 开始游戏 ——

There's a politics to how materials are used.
The beauty of mathematics only shows itself to more patient followers.
The theory of reductive groups is the backbone of the Langlands program.
解释:局势安定的国家,常常是富足的;局势 动乱的国家,常常是贫穷的。