经济学家正确地预测了过去五次衰退中的九次。

小说的艺术就是同时置身事内与事外的艺术。

The concept of law is not a concept of a thing, but of a complex social practice.

False facts are highly injurious to the progress of science, for they often endure long.  

一个人若不是其记忆的总和，又是什么呢？

人工智能的关键在于理解如何构建能够从数据中学习的系统。