The computer is the ultimate polluter: its feces are indistinguish- able from the food it produces.
计算机是最终的污染者：其粪便与所生产的食物没有区别。
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。
Science cannot solve the ultimate mystery of nature. And that is because, in the last analysis, we ourselves are part of nature and therefore part of the mystery that we are trying to solve.
I think it's important to take risks and not be afraid of failure.
世界上充满了故事，但那些留在我们心中的，是那些触及我们最深恐惧和渴望的故事。
世界上充满了显而易见的事情，却没人注意到。
每个人都害怕受伤。