economically-developed region

• 经济发达地区

economically-developed region的用法和样例：

例句

1. Aid provided by the state and developed areas to national autonomous areas has promoted their economic development.
   国家和经济发达地区对民族自治地区的支援，促进了民族自治地区的经济发展。
2. Nine-year compulsory education has basically been popularized in large and medium-sized cities and some economically developed regions.
   大中城市和部分经济发达地区已经基本普及了九年义务教育。