We almost ran into a Rolls-Royce that pulled out in front of us without signalling.我们差点就撞上了一辆劳斯莱斯，它在我们前面没打信号就开了出来。The policeman reprimanded the driver for turning without a signal.警察训斥司机不打信号就拐弯。A sailor began signalling with two flags.一名水手开始用两面旗子打信号。