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咽鼓管异常开放 yān gǔ guǎn yì cháng kāi fàng [zhèng]
otorhinol. abnormal patency of eustachian tube; patulous eustachian tube
咽鼓管异常开放[症] yān gǔ guǎn yì cháng kāi fàng [zhèng]
otorhinol. undue patency of eustachian tube