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n.扩音器
v.(用扩音器)传达
He often speaks in public with a megaphone. 他常用扩音器当着大众演说。
The mayor addressed the stirred crowd with a megaphone. 市长用扩音器向激动的群众讲话。
The conference hall was installed with radio set and megaphone. 会场里设置了收音机和扩音器。
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