—— 请按键盘 空白键 开始游戏 ——

keep fit and don't lose your nerve.
数学是一项协作的努力。没有人可以单独完成。
The death of a beautiful woman is, unquestionably, the most poetical topic in the world.
The truth is often hidden in the silence between words.
An eye for an eye will only make the whole world blind.
科学的精确性既需要严谨,也需要创造力。