—— 请按键盘 空白键 开始游戏 ——

Learning is essentially a matter of stimulus-response connections.
I don't sing because I'm happy; I'm happy because I sing.
It's not the size of the dog in the fight, it's the size of the fight in the dog.
Every piece of plastic ever made still exists somewhere on this planet—that's both our challenge and our responsibility.
Never underestimate the power of simplicity in design and execution.