opening of maxillary sinus

• 上颌窦口

opening of maxillary sinus的用法和样例：

例句

1. The airflow in the maxillary air sinus and by the maxillary hiatus was slow.
   上颌窦口和上颌窦内的气体流速均较低。
2. The endoscopic examinations showed well-opening of frontal sinus ostia.
   经鼻内镜检查额窦口开放良好。