—— 请按键盘 空白键 开始游戏 ——

I did not write half of what I saw, for I knew I would not be believed.
海洋的健康反映了我们领导力的健康。
我不害怕死亡,我害怕不去尝试。
The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.