The Doppler effect explains changes in the length of light waves or sound waves as they move toward you or away from you.

VOA: special.2009.04.29

But he brings, in effect, the sound of the downbeat in a beat early, gives it a little bit of pep there at that particular point.

但是他,事实上,把强拍的音提前了一拍,在这个位置添加了一丝刺激

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