—— 请按键盘 空白键 开始游戏 ——

PAC学习框架提供了一种形式化的方法来量化概念类的可学习性。
The mining industry has a responsibility to leave communities better than we found them.
Life is like a bracelet...It has little jewels around it which are like the little bright moments that come along in our lives every now and then...
"The immune system is like a double-edged sword; it can fight cancer but also needs to be controlled."
我们只是一个平凡星系中的一个渺小星球上的一种高等的猴子。但是我们却可以理解这个宇宙,这就是我们的独特之处。
一个人最危险的敌人是他自己的口舌。