—— 请按键盘 空白键 开始游戏 ——

Every tree planted today is an investment in a greener tomorrow.
孩子拿书的方式会告诉你他们对这本书的全部感受。
写作是重新获得自己历史的一种方式。
"The best way to learn mathematics is to do mathematics."
The international system is inherently competitive, and states are constantly trying to outmaneuver each other.