—— 请按键盘 空白键 开始游戏 ——

The process of solving a mathematical problem is often more important than the solution itself.
The value chain is the set of activities through which a product or service is created and delivered to customers.
I give my whole water in joy,“sings the waterfall,”though little of it is enough for the thirsty.
"Education is the kindling of a flame, not the filling of a vessel."
无政府状态是战争的允许性原因;它创造了一个国家必须依靠自助来确保生存的环境。