—— 请按键盘 空白键 开始游戏 ——

I've been through a lot in my life, and I'm still here.
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.
The only real mistake is the one from which we learn nothing.
Anything is possible. Don’t put limits on yourself.