Photocopiers print in two dimensions. Now,imagine how this would work for three dimensions.

VOA: special.2010.10.29

If you live in two dimensions or more, you've got to use vectors to describe most things.

如果你要考虑二维或二维以上的问题,大多数情况下需要用矢量来描述

耶鲁公开课 - 基础物理课程节选

But this is the way to do it in two dimensions.

但这也是在二维空间里的方法

耶鲁公开课 - 基础物理课程节选

First, I'd like to explore two dimensions of education and I'm thinking not only in terms of classroom education which you are familiar with but also the distance education which is so prominent in the development today.

首先，我想探究两个维度的教育,其中一个角度是,你们熟悉的课堂教育,另一个角度是远程教育,现在它的发展十分显著。

麻省理工公开课 - 媒体、教育、市场课程节选

That's the problem in two dimensions.

那是二维中的问题

耶鲁公开课 - 基础物理课程节选

Then next week we'll do more complicated problems that involve motion in higher dimensions, how to go to two dimensions or three dimensions.

下周我们将会处理更复杂的问题,包括更高维数的物体运动,如何处理二维以及三维运动

耶鲁公开课 - 基础物理课程节选

In fact, I'm going to use only two dimensions for most of the time because the difference between one dimension and two is very great.

实际上,大多数时候我只考虑二维的情况,因为一维和二维的差别很大

耶鲁公开课 - 基础物理课程节选