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

每架飞一着陆, 扩器就发出通告。

He gave a tap at the microphone before speaking.

他讲话前先轻叩了一下扩器。

He used a microphone so that everyone could hear him.

"他使用扩器,使人人都能听见他的讲话。"

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，因为它的确是的。

Amplifier is electrical device which make sounds louder.

扩器是一种使声放大的电气装置。

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

候选人从车顶的窗口探出头来，扩器下他的嗓嘈杂。

All the speakers hook up to a single amplifier.

所有喇叭都接单一的扩器上。