—— 请按键盘 空白键 开始游戏 ——

A good mathematician is someone who can see analogies between theorems. A great mathematician is someone who can see analogies between analogies.
说到底,作家只是他书的一半。另一半是读者,作家从读者那里学习。
Safety is the lifeline of the petroleum industry; it must never be neglected.
The study of computation is essential to understanding the limits of what can be computed.