Velocity is the measurement of the speed of the ground motion.
地震速度是用来测量地壳运动速度的。
Is the motion with even variable velocity the result of constant force?
匀变速运动是恒力作用的结果吗？
Response is a function of the instantaneus velocity of motion;
反应幅度与图形运动速度有关；
Response is a function of the instantaneus velocity of motion;
反应幅度与图形运动速度有关；
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