—— 请按键盘 空白键 开始游戏 ——

Innovation in mining isn't optional—it's essential for survival and growth.
通过别人的鞋可以了解很多东西,他们从哪儿来,将要到哪儿去。
The greatest wisdom is to realize one's own ignorance.
The mind is a temporal sequence of processes.
The joy of mathematics comes from the struggle to understand.
我们不需要另一个英雄。