an electronic amplification system used as a communication system in public areas
例句
用作名词 (n.)
The public address system in the hospital was used for paging. 医院里的扩音系统用来呼叫人名。
When she played a recording of "play panting" through the speaker system at a shelter in Spokane Valley, all the barking dogs quieted within a minute. 在华盛顿斯波坎县一间狗舍，当她通过扩音系统播放之前录下的狗狗们的的喘息声时，所有正在吠叫的狗都在几分钟之内安静了下来。
She said she would page him over the public-address system. 她说她要通过有线广播系统呼唤名字来寻找他。
美
