记录设备的频率响应是上述记录媒质经过磁头的相对运动速度的函数。

The frequency response of recording devices is a function of the relative speed of the recording medium past the head.

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本文提出质点和质点系(绝对运动和相对运动)质量加速度矩定理。

This paper proposes the theorem of moment about mass acceleration of the particle and the system of particles (absolute motion and relative motion).

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在一特定的转动参照系中，利用相对运动的速度和加速度合成公式，通过一特定的相对运动简洁地导出常用坐标系中的速度和加速度表达。

Expressions of velocities and accelerations in usual coordinates are simply derived by means of the composition formulae of velocity and acceleration in special rotation reference systems.

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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

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