under-developed region

• 欠发达地区

under-developed region的用法和样例：

例句

1. Developed regions should assist and stimulate the development of underdeveloped regions in various ways.
   发达地区要采取多种方式帮助和带动欠发达地区。
2. It is right to establish economic cooperation between developed and less developed areas.
   在发达地区和相对欠发达地区搞经济协作区，这是对的。