—— 请按键盘 空白键 开始游戏 ——

The rules of survival never change, whether you’re in a desert or in an arena.
It’s on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.
韩寒:“其实说穿了,教师只是一种职业,是养家糊口的一个途径,和出租车司机,清洁工没有本质的区别。”
The essence of mathematics lies in its freedom.