He often speaks in public with a megaphone.
他常用扩音器当着大众演说。
He hawks with a megaphone, saving a lot of effort.
他用喇叭筒叫卖，省劲多了！
Making monetary policy by megaphone never leads to good results.
夸夸其谈的货币政策决不会取得效果。
Connect the audio out to a set of speakers and you have a megaphone.
连接到一组扬声器音频输出，你有一个扩音器。
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