velocity change的用法和樣例：
例句
- She said that our energies and rates of vibratory change are so rapid now that we see a series of rapid actions quickly.
她說我們的能量和振動的速度變化如此之快以致我們現在看到了一系列敏捷迅速的行動。 - By comparing two successive displacements of the ball, we can find the change in velocity in the corresponding time interval.
比較球的先後相繼的兩個位移，就可求出對應於這段時間內的速度變化。
