He gave a tap at the microphone before speaking.
他在讲话前先轻叩了
下扩音
。
He gave a tap at the microphone before speaking.
他在讲话前先轻叩了下扩音。
Amplifier is electrical device which make sounds louder.
扩音
种使声音放大
电气装置。
All the speakers hook up to a single amplifier.
所有喇叭都接在单扩音上。
The loudspeaker announced each airplane as it landed at the airport.
每架飞机在机场着陆, 扩音
发出通告。
He used a microphone so that everyone could hear him.
"他使用扩音,使人人都能听见他讲话。"
The Mega-Sonic Scatter-Cat Repeller looks like a megaphone because it actually is one.
这个超音波驱猫看上去像个扩音，因
确。
SASHED candidates standing on car roofs, their voices crackling through loudspeakers.
候选人从车顶窗口探出头来，扩音下他嗓音略微嘈杂。
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