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

Then we've just shown here, it's an accelerated frame of reference.

就像这里写的一样,它是个有加速度的参考系

耶鲁公开课 - 基础物理课程节选

I gave you a law of transformation of the components; namely, if the vector has components Ax and Ay in one reference frame and Ax prime and Ay prime in another reference frame, how are the two related?

我介绍过分量变换的法则,即如果矢量在一个坐标系的分量为 Ax 和 Ay,在另一坐标系中的分量为 Ax' 与 Ay',它们有着什么样的联系

耶鲁公开课 - 基础物理课程节选

Books, historical events and the myths that grow up around them, places, memories and ways of doing things form a common frame of cultural reference that defines a nation.

ECONOMIST: Britishness

Nairobi, Kenya (CNN) -- When I think of the story of African women, I immediately think of my mother and I want to use her story as a frame of reference in how African leaders can improve the lives of women.

CNN: Opinion: 'African women need a hand-up not a hand-out'

While not an exact scientific measure, a sampling of U.S. doctrinal writings on IW could provide a useful frame of reference and possibly some context for comparison between Chinese and American thinking.

CENTERFORSECURITYPOLICY: What is IW?