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

Today we're going to move away from the first dimension of music that we've been looking at, which is duration, or time, and begin to work with the second, which is pitch, and melody.

今天我们要结束对音乐的第一个维度的学习,即时值,或者说拍子,并开始讨论音乐的第二维度,即音高与旋律

耶鲁公开课 - 聆听音乐课程节选

I think you can tell by analogy with what I did in one dimension that the position of that object at any time t is going to be the initial position plus velocity times t plus one half a t square.

你们可以类比一下我在一维情况下的结论,这个物体在任意时刻 t 的位移,等于初始位移,加上 v ? t + 1/2 ? a ? t^2

耶鲁公开课 - 基础物理课程节选