—— 请按键盘 空白键 开始游戏 ——

I am always glad to think that my education was, for the most part, informal, and had its roots in the real world.
Quality is never an accident; it is always the result of intelligent effort.
Sustainability is the future of quarrying, and we must act now.
学习是系统中产生的任何变化,这种变化或多或少会永久性地改变其适应环境的能力。
夜晚是一片伟大的森林,但星星是它的树木。
A true friend is someone who sees the pain in your eyes while everyone else believes the smile on your face.