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 PAC learning framework provides a formal way to quantify the learnability of a concept class.
Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.
"It's the possibility of having a dream come true that makes life interesting."