the most developed countries

• 最发达的国家

the most developed countries的用法和样例：

例句

1. Nanhai, one of the most economic-developed areas in our country, has made the enormous achievements in economic and social development since reform and open policy.
   南海作为我国经济最发达的地区之一，改革开放以来，其经济和社会发展取得了巨大成就。