—— 请按键盘 空白键 开始游戏 ——

The task of the teacher is to lead the student from the known to the unknown.
The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
The land is the real client, not the person who pays the fee.
我离开职位的时间越长,我就越觉得自己是无所不能的。