But things which were at rest will move at a constant velocity, opposite of the velocity that you have relative to me.

这些静止的东西都在匀速运动,方向正好跟你相对我运动的速度方向相反

耶鲁公开课 - 基础物理课程节选

In particular, the things that I say are at rest, you will say are moving backwards at the velocity that you have relative to me.

特别是那些在我看来是静止的物体,在你看来却在后退,后退的速度等于我们之间的相对速度

耶鲁公开课 - 基础物理课程节选

That'll say the velocity of the object with respect to the ground, the velocity of the object with respect to the plane, the velocity of the plane with respect to the ground.

可以得到物体相对于地面的速度,物体相对于平面的速度,物体相对于地面的速度

耶鲁公开课 - 基础物理课程节选

When you have a velocity in the moving plane frame and you want to find the velocity on the ground, you should add to every object in the plane the velocity of the plane with respect to the ground.

当你在运动的飞机上运动,然后你想找到相对于地面的速度,你就应该给每个物体加上,飞机相对于地面的速度

耶鲁公开课 - 基础物理课程节选