那兩組交通燈不同步因而發(fā)生了幾起事故。 The two sets of traffic lights were out of phase (ie did not show the same change at the same time) and several accidents occurred.
(同步電動機(jī)的)速度偏差同步電機(jī)運(yùn)行速度的周期性變化 The periodic variation in speed of a synchronous motor with respect to the current.
那兩組交通燈不同步。 The two sets of traffic lights were out of phase.