underdeveloped regions的用法和样例：
例句
- 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。 - And a substantial component of that burden is because of the high levels of child maotalage mortality in Afric Africa compared with to other regions.
非洲的问题尤其突出，各种疾病的肆虐，使得非洲大陆的早产儿死亡率高达其他欠发达地区的两倍。
