less-developed areas的用法和样例：
例句
- It is our goal that the people in the undeveloped areas will be finally off poverty.
我们的目标是使不发达地区的人民最终摆脱贫困。 - 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。
