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。

Sustainability isn't an option; it's a responsibility we owe to future generations.

The truth is not always what it seems, and sometimes it is better not to know it.

Curiosity is the engine that drives scientific discovery.

真相很少是纯粹的，也从来不是简单的。

I hope that the Pacific Ocean is as blue as I dreamed I was.

我不想当明星，我想成为传奇。