Some new concepts such as relative force, relative acceleration, relative reference frame, absolute force, absolute acceleration, and absolute reference frame was put forward.

提出了相对力、相对加速度、相对参照系和绝对力、绝对加速度、绝对参照系的新概念。

youdao

Geocenter motion is the relative displacement from the center of mass of Earth to the origin of the Terrestrial Reference Frame.

地球质心(简称地心)是指包括海洋大气等的整个地球的质量中心，地心运动是地球质量中心相对于地球参考框架原点的位移。

youdao

Meanwhile, it presents frame construction of Marine reference materials as well as relative Suggestions and countermeasures.

同时提出了海洋标准物质体系的框架结构和相关建议与对策。

youdao

So the Earth is an inertial frame of reference, if you go in a train relative to the Earth at constant velocity, you're also inertial.

所以,地球是一个惯性参考系,如果你坐在相对于地球匀速运动的火车里,你也处于惯性状态

耶鲁公开课 - 基础物理课程节选