tracing float造句

例句与造句

1. Application of a rapid survey method to trace floating children status and to investigate polio vaccine immunization coverage rate of supplementary immunization
   快速调查方法在儿童流动状况及脊髓灰质炎疫苗强化免疫接种率调查中的应用
2. It's difficult to find tracing float in a sentence. 用tracing float造句挺难的