underdeveloped districts的用法和樣例：
例句
- Developed regions should assist and stimulate the development of underdeveloped regions in various ways.
發達地區要採取多種方式幫助和帶動欠發達地區。 - The principal diseases in developed areas were vaginitis and other diseases, whereas cervicitis and leiomyoma uteri were prevalent in underdeveloped counties.
經濟發達地區婦女生殖道疾病以陰道炎和其他疾病為主，而經濟欠發達地區以宮頸炎和子宮肌瘤為主。
