基本解释扬声同根派生 英汉例句Loudspeaker van; loudspeaking (or Boom) car; sound truck 宣传车sound truck;loudspeaking (or boom) car;Loudspeaker van 宣传车loudspeaking telephone set 扬声电话机loudspeaking set 扬声电话机loudspeaking telephone 扬声电话机