In the context of computational learning, the concept of 'probably approximately correct' (PAC) learning provides a framework for understanding the efficiency and feasibility of learning algorithms.

The streets were dark with something more than night.

We are all broken, that's how the light gets in.

音乐是我的生命，谢谢你们让我的生命有了意义。

阅读的魔力在于它让我们可以活出一千种人生。