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 speech we hear is an indication of that which we don't hear. It is a necessary avoidance, a violent, sly, anguished or mocking smokescreen which keeps the other in its place.

成为哲学家不仅仅是有微妙的思想，甚至也不是建立一个学派，而是如此热爱智慧以至于按照它的指示生活。

Regulatory challenges are not barriers; they are guardrails for excellence.

我不害怕变老。我更有经验，更聪明，更有耐心。