—— 请按键盘 空白键 开始游戏 ——

如果易用性是唯一的要求,那么每个人都会还在骑三轮车。
我认为你不能比较网球的不同时代。每个时代都有其伟大的球员。
世界充满了简单、明显而美丽的事物,以至于人们竟然还会去发明任何东西,这真是令人惊奇。
Cleverness is a gift, kindness is a choice.
The challenge of our time is to build an economy that works for everyone, not just the privileged few.
The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.