最終更新日：2024/08/07
The Eustachian tube helps equalize air pressure between the middle ear and the throat.
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The Eustachian tube helps equalize air pressure between the middle ear and the throat.
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The Eustachian tube helps equalize air pressure between the middle ear and the throat.
The Eustachian tube helps equalize air pressure between the middle ear and the throat.
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