A megaphone boomed out, "This is the police."
扩音器传出了低沉而响亮的声音：“我们是警察。”
He hawks with a megaphone, saving a lot of effort.
他用喇叭筒叫卖，省劲多了！
Somewhere a voice is loud a megaphone.
远处什么地方的扩音器里传来响亮的声音。
Somewhere a voice is loud on a megaphone.
远处什么地方的扩音器里传来响亮的声音。
He often speaks in public with a megaphone.
他常用扩音器当着大众演说。
The conference hall was installed with radio set and megaphone.
会场里设置了收音机和扩音器。
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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