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.
质量始于农场，卓越来自于对细节的不懈关注。
I have always believed that if you want to achieve anything in life, you have to work for it.
Music is a language that can express emotions that words cannot describe.
