the economic developed area的用法和樣例：
例句
- Aid provided by the state and developed areas to national autonomous areas has promoted their economic development.
國家和經(jīng)濟發(fā)達地區對民族自治地區的支援，促進(jìn)了民族自治地區的經(jīng)濟發(fā)展。 - Nine-year compulsory education has basically been popularized in large and medium-sized cities and some economically developed regions.
大中城市和部分經(jīng)濟發(fā)達地區已經(jīng)基本普及了九年義務(wù)教育。
