—— 请按键盘 空白键 开始游戏 ——

数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
"To be Irish is to know that in the end the world will break your heart."
A proof is a device for convincing someone else that a mathematical statement is true.
Life is too short to waste time on things that don’t matter.