考虑同一物体时，我可不愿把符号倒来倒去。

I don't want to have a plus and a minus sign there have to think about that it means the same thing.

youdao

而平衡力则是作用在同一物体上。

The balance force is on the same object.

youdao

对同一物体拍两张照片，之间的间隔正好与两眼间距相近则能创造出同样效果来。

Taking two pictures of the same thing, spaced as far apart as a pair of eyes, will create the same effect.

youdao

Pick any two perpendicular directions Then the same entity, the same arrow which has an existence of its own, independent of axis, can be described by you and me using different numbers.

选取两个互相垂直的方向,这样同样的物体,同一矢量,并且是独立于坐标轴而存在的,可以被你和我用不同的数字来描述

耶鲁公开课 - 基础物理课程节选