Relativity is useful in its domain of velocities near the speed of light.

相对论是在其速度接近光速的速度域有用。

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As a whole, the groups with BRGs tended to have more galaxies which were more luminous, and had a greater variety of velocities.

总的来说，含有BRG的星系群倾向于含有更多的明亮星系，在周转速度上的差异也更大。

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Act returns a pair of velocities - translational and rotational (in that order) - that show the action it wants the motor to take.

act返回两个速度(依次为平移速度和旋转速度)，表示希望发动机执行的动作。

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It's useful to have the average acceleration, which you can find by taking similar differences of velocities.

平均加速度也是很有用的,你可以用类似方法,取速度的变化量求出来

耶鲁公开课 - 基础物理课程节选

Take the difference of the two velocities and divide by the difference of the two times, and you've got the acceleration.

求出速度的差值,除以时间的差值,这样就能得到加速度

耶鲁公开课 - 基础物理课程节选

The stars examined by Dr Wyse and her colleagues have a variety of velocities and chemical compositions.

ECONOMIST: Stellar origins

The Doppler effect (familiar from the changing pitch of a passing police siren) gives away the velocities of these particles and Dr Haller's computers are able to crunch the resulting data in the light of Lagrange's theories and work out the network of coherent structures that is causing their movements and the pattern of updraughts and downdraughts that should result.

ECONOMIST: Lagrangian coherent structures

Sequential optical images of high spatial resolution were used for the first time to derive surface ice velocities of Glaciar Upsala, a fast-moving fresh-water calving glacier in southern Patagonia.

UNESCO: Dublin Core