—— 请按键盘 空白键 开始游戏 ——

The theory of economic development is the study of how the economic system generates the forces which incessantly transform it.
为派对摇滚道歉
一个人如果吃不好,就无法好好思考、好好去爱、好好休息。
Every ton of coal we extract must create maximum value with minimum environmental impact.
The joy of mathematics comes from the moments of clarity when complex things become simple.