free megaphones 免费的高音喇叭 ; 免费扩音器
Transistor powered megaphones 电晶体扩音器
Transistor megaphones 晶体管扩音器
Huge Signs And Megaphones 巨大招牌和扩音器
以上来源于: WordNet
N-COUNT A megaphone is a cone-shaped device for making your voice sound louder in the open air. 麦克风
→ see also bullhorn
The conference hall was installed with radio sets and megaphones.
会场里设置了收音机和扩音器。
Blogs have enabled economists to turn their microphones into megaphones.
博客使得经济学家们把他们的麦克风变成了扩音器。
There is strong evidence that the actors wore masks that were fitted out with small megaphones to assist in increasing the directivity of the voices.
有确凿证据表明当时的表演者们戴着装有小型扩音器的面具，以辅助声音的方向性传播。
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