—— 请按键盘 空白键 开始游戏 ——

The strength of a habit is a function of the number of times it has been reinforced.
The revolution is not an apple that falls when it is ripe. You have to make it fall.
The mining industry must lead by example in safety, sustainability and social responsibility.
The past is a foreign country; they do things differently there.
以孩子们能理解的方式写一些困难的主题是很重要的。