The Doppler frequency can be obtained as a heterodyne or beat effect.

由于外差或频差效应，能够得到多普勒频率。

youdao

It is shown that quantum beat effect exists in the time-resolved degenerate four-wave mixing.

指出在这种简并四波混频中同样可能存在量子拍频效应。

youdao

Heart rates also fell by nearly half without much effect on blood pressure or the strength of the heart-beat.

心率下降了近一半，但对血压和心跳强度没有产生太大的影响。

youdao

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

耶鲁公开课 - 聆听音乐课程节选

When you try to beat the market in this way, you are, in effect, competing with the rest of the world.

ECONOMIST: A survey of fund management

Those same stocks beat their benchmarks by nearly 7 points in November, as the effect wore off, Prof.

WSJ: Is the 'September Swoon' for Real?

And so that you get into the problem that you don't have the resources to spend on things that we know have a deterrent effect, we know have an effect on crime, whether it's the cop on the beat or it's social service.

NPR: Public Surveillance: Security vs. Privacy, Part 2