1. The police on duty tried to shoo away the crowd by using a loud-speaker. 在值班的警员试着把人群散去，于是他使用了扬声器。
2. She gave up talking as she saw bette was trying to listen to the speech that was being relayed through a loud-speaker tied to one of the trees. 系在一棵树上的扩音机里传过来人家的演讲，她看见蓓蒂要听就不说话了。
3. Explosion-proof flexible connecting pipes is used in explosion-proof telephone station, explosion-proof terminal, explosion-proof loud-speaker inlet or outlet to conduit and protect the cable. 防爆挠线连接管用于防爆电话站、防爆接线箱、防爆扬声器的输入，输出口到布线钢管之间的过渡连接，起到保护电缆的作用。
4. It's what allows us to pick out the words from just one speaker even when we're in a room full of other voices that are just as loud. 鸡尾酒会效应指的就是，我们可以从一屋子的杂音中分辨出某些言语，即使它们和周围的声音一样嘈杂。
5. They were sitting together at a restaurant, and loud music with a heavy beat poured out of a nearby speaker as they ate. 他们一起坐在餐厅里，吃饭时听到附近喇叭里传出轰轰的音乐并伴有重重的打击声响。
