那两组交通灯不同步因而发生了几起事故。
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.
沿路前行直至有交通灯处。
Go down the road till you reach the traffic lights.
那两组交通灯不同步。
The two sets of traffic lights were out of phase.
