Objective To understand the current status of perinatal healthcare quality for the migrating population in Changing County and provide a basis for implementation of efficient countermeasures.

目的了解流动人口孕产妇围产期保健质量，为采取有效的干预措施提供依据。

youdao

The history of peasants' migrating to cities was actually a changing history of the institution about the free migration and employment rights as well as other rights of the rural population.

新中国农民进城的历史实际上是一部国家关于农民自由迁徙权、自由择业权等众多进城权利的制度变动史。

youdao

Puerto Ricans have been migrating to the United States since the 1800s, but it wasn't until World War II that this population movement peaked.

CNN: Commentary: Sotomayor as American as mango pie