—— 请按键盘 空白键 开始游戏 ——

The only limit to our realization of tomorrow will be our doubts of today.
The historian is a prophet looking backwards.
The P versus NP problem is one of the most important problems in computer science.
作家的生活是一种怀疑的生活。
It is a curious subject of observation and inquiry, whether hatred and love be not the same thing at bottom.