By the one, the few, the many, ? or some combination of these three categories?

专制，寡头，民主，或混合政体？

耶鲁公开课 - 政治哲学导论课程节选

It's useful to separate these kinds of signals into three categories.

将这些信号分为三大类会比较容易理解

耶鲁公开课 - 生物医学工程探索课程节选

I would say there are three categories that they fall into.

我觉得它们之间的关系共分三种

耶鲁公开课 - 古希腊历史简介课程节选

We're going to consider first of all the view of the gods, The view of humans and the view of the world: three distinct categories.

首先我们来考虑对神的看法，对人类及世界的看法：,三种截然不同的类别。

耶鲁公开课 - 旧约导论课程节选

These are the things that we do best and where we have advanced course work available in these three categories and so I'm going to emphasize these three but we'll talk about all of these subjects as we go through the course.

这是我们做的最好的三个方向,在这三个方向下我们开设有高阶的课程,因此我会重点讲这三个方向,但随着课程的进行,所有的主题我们都会讲到

耶鲁公开课 - 生物医学工程探索课程节选