As we have seen, all this makes perfect sense to observer a in terms of the length contraction produced by the motion of the rulers around the periphery.
如我们所见的，就圆周上的尺子的运动所引起的尺缩来讲，使观察者A觉得完全是合情合理的。
The relation of length force and force velocity are two important characters for skeletal muscle contraction, but there is still limitation when describing the nature of skeletal muscle.
长度—力和力—速度关系是骨骼肌收缩的两个最重要的性质，但用其描述骨骼肌性质时仍有局限性。
The superposition property of elastic wave's Doppler effect and the influence of relativistic time dilation and length contraction on elastic wave's Doppler effect are also discussed.
讨论了弹性波多普勒效应的叠加性质，并指出相对论的时间膨胀和长度收缩对弹性波多普勒效应的影响。
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