—— 请按键盘 空白键 开始游戏 ——

当你怀疑自己能否飞翔的那一刻,你就永远失去了飞翔的能力。
As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.
传统方法蕴含智慧,但可持续发展要求我们在必要时超越它们。