扩音器

The loudspeaker announced each airplane as it landed at the airport.

每架飞机在机陆, 扩器就发出通告。

He gave a tap at the microphone before speaking.

他在讲话前先轻叩了下扩器。

He used a microphone so that everyone could hear him.

"他使用扩器,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.

这个超波驱猫器上去像个扩器，因为它确是。

Amplifier is electrical device which make sounds louder.

扩器是种使声放大电气装置。

SASHED candidates standing on car roofs, their voices crackling through loudspeakers.

候选人从车顶窗口探出头来，扩器下他略微嘈杂。

All the speakers hook up to a single amplifier.

所有喇叭都接在单扩器上。