an abnormal passage leading from a suppurating cavity to the body surface
any of various air-filled cavities especially in the bones of the skull
a wide channel containing blood; does not have the coating of an ordinary blood vessel
例句
用作名词 (n.)
If you cannot equalize pressure in the middle ear cavities or sinuses, you should not continue to descend. 如果你不能平衡耳腔和鼻窦内的压力,你必须停止下潜。
Sinonasal undifferentiated carcinoma is an uncommon aggressive malignancy of the nasal cavity and the paranasal sinuses. 摘要鼻腔鼻窦未分化细胞癌是一种罕见且侵犯性很高的鼻腔及鼻窦恶性肿瘤。