每本书都是一次旅程，每次旅程都是一本书。
The complexity of a learning problem is often determined by the size and structure of the hypothesis space.
社会学的功能，如同每一门科学一样，是揭示隐藏的事物。
The books that we reread the most are the ones that most clearly describe the world we already know.
我们重读最多的书是那些最清楚地描述我们已经知道的世界的书。