单词：repeater system
增音系统
repeater system的用法和样例：
例句
- 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。
