(about a country, society, etc.) having few industries and a low standard of living （国家、社会等）不发达的◆underdeveloped countries 不发达国家ⓘ ‘Developing countries’ is now the usual term used. 现在通常用 developing countries 一词。
not developed to a very high level or standard 开发不充分的◆Telecommunications systems in the region remain underdeveloped. 这个地区的电讯系统发展仍然不充分。