The PAC learning framework provides a formal way to quantify the learnability of a concept class.
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。
我不会坐在这里说我是个榜样什么的，但我确实认为我有责任。
The end of the battle of El Alamein is not war, not even the beginning of the war period ended, and may be the end of the war period.
We must learn to listen to what materials want to say.
艺术的意义不是固定的，它随着观众而演变。
I paint what I like, when I like, and where I like.