The Doppler frequency can be obtained as a heterodyne or beateffect.
由于外差或频差效应，能够得到多普勒频率。
2
It is shown that quantum beateffect 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。
3
The phenomenon has been described as the Wimbledon effect: Britain provides the beautiful arena where foreign champions come and beat the hell out of British players.