RESULTS Obstruction of frontal sinus ostium was found in all cases.The frontal sinus ostia were obstructed by swelling mucosa, polypid mucosa or over developed cells.是什么意思_RESULTS Obstruction of frontal sinus ostium was found in all cases.The frontal sinus ostia were obstructed by swelling mucosa, polypid mucosa or over developed cells.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句