less-developed areas的用法和樣例：
例句
- It is our goal that the people in the undeveloped areas will be finally off poverty.
我們的目標是使不發達地區的人民最終擺脫貧困。 - The working style and service level concerning family planning in most rural regions, especially in some economically underdeveloped areas, remain to be improved.
大多數農村地區特別是在一些經濟不發達地區，計劃生育工作方法和服務水平還有待改進和提高。
