n.擴音器
v.(用擴音器)傳達
He often speaks in public with a megaphone. 他常用擴音器當著大眾演說。
The mayor addressed the stirred crowd with a megaphone. 市長用擴音器向激動的群眾講話。
The conference hall was installed with radio set and megaphone. 會場里設置了收音機和擴音器。
