—— 请按键盘 空白键 开始游戏 ——

To understand mathematics is to understand the fabric of reality.
Without some goals and some efforts to reach them, no man can live. What we call life is a journey, and the journey itself is home.
煤炭企业在追求经济效益的同时必须履行社会责任。
A writer is someone who pays attention to the world.
今天所做之事勿候明天,自己所做之事勿候他人。