For instance, it doesn't hold in a reference frame which itself is being accelerated.
例如，它并不在具有，加速度的参考系中成立。
2
By contrast, unit shipments have increased slightly over the same time frame (2.6% CAGR), as lower-priced VFD sales have accelerated marginally during this same period.
Some concepts such as relative rest reference frame, relative uniform motion reference frame, and relative accelerated motion reference frame was confirmed.