public-address system扩音系统;有线广播
public c address system有线广播系统;展厅广播设备
cablecasting public-address system有线广播
turn up the public-address system调高播音系统的音量
Emergency Public Address System紧急公共广播系统
intrastation public address system厂内播音系统
cabin public address system客舱广播系统
marine public address system船用广播设备
Public Address System On音向运作;音响运作
N-COUNT（可数名词） A public address system is a set of electrical equipment which allows someone's voice, or music, to be heard throughout a large building or area. The abbreviation is also used. 播音装置; 可缩写为PA