retension造句

例句与造句

1. the incidence of retension of secretions was about 12 % . from 2 weeks to 6 months after stent implantaion, the incidence of secretion retention was about 15 %
   方法回顾性分析我院75例气道内金属支架置入患者，总结支架的并发症及治疗等。
2. It's difficult to find retension in a sentence. 用retension造句挺难的