ostium造句

1、A certainty basic foundation for precision determine the cannon ostium velocity are offered.
从而为精确测定炮口速度提供了一定的理论基础。

2、If the ostium of sinus were traumatized, it might become an etiologic factor of chronic sinusitis.
若伤口波及鼻窦开口，将导致慢性鼻窦炎的形成。

3、There is high percentage of cases with accurate position of stent in ostium confirmed by IVUS.
经过IVUS检查证实大部分支架在冠状动脉口部病变处能准确置入。