The concept of probably approximately correct (PAC) learning has been foundational in computational learning theory.
可能近似正确（PAC）学习的概念在计算学习理论中具有基础性意义。
我认为忘记某人的最好方法就是和别人在一起。
我们不能向您保证我们将实现今年所有的目标，过去几年我们也没有实现所有的目标，但我们可以向您保证，我们将执着于用户体验 。
每个故事都是一次旅程，每次旅程都是一个故事。
The community is a fictitious body， composed of the individual persons who are considered as constituting as it were its members.
The digital revolution has transformed the way we think about markets, competition, and economic policy.
I’m a guy who believes in the team concept.
数学不知道种族或地理界限；对于数学来说，文化世界是一个国家。
"The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'"