1·In experimenting we find out that sound travels with different velocities through different substances.
在实验中，我们发现声音以不同的速度通过不同的物质而传播。
—— 《新英汉大辞典》
2·By compiling a map of seismic velocities from thousands of earthquakes across the globe, they can also begin to map temperatures and densities throughout the mantle.
通过编制全球数千次地震的地震速度图，他们还可以开始绘制地幔的温度和密度图。
3·All right, so far, about speeds and average velocities and accelerations.
目前为止，是关于速率，平均速度和加速度。
4·At each time step, we calculate the forces on each atom, then we update the velocities and the positions according to Newton's second law.
在每个步骤中，我们计算每个原子受到的作用力，然后根据牛顿第二法则更新速度和位置。
5·This organ has a remarkable ability to sense the velocities of flows.
这个器官有一个值得注意的功能，就是感受水流的速度。