incurrent ostia

例句：

1. 1. The river flows through the town, providing fresh water for the residents.
   这条河穿过城镇，为居民提供新鲜水。
2. 2.The scientist noticed an incurrent ostia in the sample, which could be a clue to its origin.
   科学家注意到样本中有一个流入的开口，这可能是其来源线索。
3. 3. The incurrent ostia of the pipeline were sealed with a special material to prevent leakage.
   管道的流入开口被一种特殊的材料密封，以防止泄漏。