The adjacent structures of the ostia differ from each other by the different location of the ostium.The clinical significance of the ostium and the nasofrontal duct were discussed.
认为，开口于不同部位的额窦窦口周围结构不同，对研究额窦的生理、病理，以及提高鼻窦内
镜检查和额窦开放手术具有重要的参考和指导意义。
]
；口（ostium的复数）The adjacent structures of the ostia differ from each other by the different location of the ostium.The clinical significance of the ostium and the nasofrontal duct were discussed.
认为，开口于不同部位的额窦窦口周围结构不同，对研究额窦的生理、病理，以及提高鼻窦内镜检查和额窦开放手术具有重要的参考和指导意义。
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