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单语范例（未经PONS编辑处理）
A moving frame is then a frame of reference which moves with the observer along a trajectory (a curve).
en.wikipedia.org Agreement of the two approaches demonstrates that one could start from the general expression for fictitious acceleration above and derive the trajectories shown here.
en.wikipedia.org The first researcher to use pre-loss data, he outlined four trajectories of grief.
en.wikipedia.org Actually he was just following a trajectory that was taking him closer to the essence of the music he was hearing.
en.wikipedia.org He can judge range and trajectory just by eyesight.
en.wikipedia.org