扩音机

loud-speaker

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kuò yīn jī

n. loudspeaker, megaphone

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kuo4 yin1 ji1

amplifier, loudspeaker, hearing aid

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扩音机

kuò yīn jī

audio power amplifier

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擴音機|扩音机 [kuò yīn jī] ► amplifier ► loudspeaker ► hearing aid