空间里的空气振动得很快，发出了声响。
经听骨链、鼓膜传人外耳道，引起空气振动。
After the auditory bone chain, the tympanic membrane teach other people the external auditory meatus, causes the air vibration.
你已经知道，声音使空气振动，从而产生了声波。
You have read that sound makes air vibrate, thus making sound waves.
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