At present,its etiology and pathogenesis are not very clear,which maybe related to Eustachian tube dysfunction,allergy and infection.是什么意思_At present,its etiology and pathogenesis are not very clear,which maybe related to Eustachian tube dysfunction,allergy and infection.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句