—— 请按键盘 空白键 开始游戏 ——

I went to the woods because I wished to live deliberately. I wanted to live deep and suck out all the marrow of life, to put to rout all that was not life.
When I start, my first idea for a building is with the material.
The best way of learning about anything is by doing.
The power of mathematics lies in its ability to abstract and generalize.
一个人的错误是他发现的门户。