—— 请按键盘 空白键 开始游戏 ——

Boundaries define us. They define what is me and what is not me. A boundary shows me where I end and someone else begins, leading me to a sense of ownership.
数学不是关于数字、方程、计算或算法的:它是关于理解的。
You have to be able to laugh at yourself and not take yourself too seriously.