underdeveloped region

• 不发达地区

underdeveloped region的用法和样例：

例句

1. The working style and service level concerning family planning in most rural regions, especially in some economically underdeveloped areas, remain to be improved.
   大多数农村地区特别是在一些经济不发达地区，计划生育工作方法和服务水平还有待改进和提高。