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

每架飞机在机场一着陆, 扩就发出通告。

He gave a tap at the microphone before speaking.

在讲话前先轻叩了一下扩。

He used a microphone so that everyone could hear him.

"使用扩,使人人都能听见讲话。"

The Mega-Sonic Scatter-Cat Repeller looks like a megaphone because it actually is one.

这个超波驱猫上去像个扩，因为它确是。

Amplifier is electrical device which make sounds louder.

扩是一种使声放气装置。

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

候选人从车顶窗口探出头来，扩下嗓略微嘈杂。

All the speakers hook up to a single amplifier.

所有喇叭都接在单一扩上。