—— 请按键盘 空白键 开始游戏 ——

I always think about how to make batteries safer and more efficient.
The probability of a response is determined by its reinforcement history.
在我看来,一种信仰只是一个信仰现象,信仰的内容无足轻重。
Fear is such a powerful emotion for humans that when we allow it to take us over, it drives compassion right out of our hearts.
"The world is changed by your example, not by your opinion."