Now, I've not given you any other example besides the displacement vector, but at the moment, we'll define a vector to be any object which looks like some multiple of i plus some multiple of j.

除了位移矢量之外,我就不再举其他的例子了,但是现在我们要定义一个矢量,可以表示为 i 的倍数加上 j 的倍数

耶鲁公开课 - 基础物理课程节选

For that purpose, to describe that displacement, we use a vector.

在这种情况下,我们就用矢量来描述位移

耶鲁公开课 - 基础物理课程节选