1. The police addressed the crowd through loudspeaker on their car. 警察通过他们汽车上的喇叭向人群喊话。
2. The loudspeaker announced each airplane as it landed at the airport. 每架飞机在机场一着陆，扩音器就发出通告。
3. With the bass plugs mounted in the bass reflex ports, the cabinet is closed and the loudspeaker operates as a closed construction. 将低音插头接入低音反射端口，可以将音箱设置为密闭式音箱，使其像密闭式音箱一样工作。
英英解释
n.
1. electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at
