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
于不同部位的额窦窦
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
。
（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，开于不同部位的额窦窦结构不同，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。
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