After the auditory bone chain, the tympanic membrane teach other people the external auditory meatus, causes the air vibration.

经听骨链、鼓膜传人外耳道，引起空气振动。

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After the auditory bone chain, the tympanic membrane teach other people the external auditory meatus, causes the air vibration.

经听骨链、鼓膜传人外耳道，引起空气振动。

youdao