n. hodograph
misc. velocity plan
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。
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.
了解位置、速率和加速度图。
指出了瞬心速度图与瞬心图的动态同构关系。
The dynamic isomorphic relations between instant center velocity chart and instant center chart are indicated as well.
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