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1·His theory was inapplicable to many underdeveloped economies.

他的理论不适用于许多不发达的经济体。《柯林斯英汉双解大词典》

2·Underdeveloped countries should be assisted by allowing them access to modern technology.

应该通过允许不发达国家使用现代技术来帮助它们。《柯林斯英汉双解大词典》

3·Low average population densities are characteristics of most underdeveloped countries.

平均人口密度低是大多数不发达国家的特点。

4·It could eventually overcome the disparities between the privileged and the underdeveloped.

它最终可以克服享有特权者和未发达者之间的差距。

5·China is trying to make optimal use of educational resources so that rural and underdeveloped areas will get more support.

中国正在努力地将教育资源最大化使用，这样农村和欠发达地区将获得更多的支持。

6·China is making efforts to optimize the use of educational resources so that rural and underdeveloped areas can receive more support.

中国正在努力优化教育资源的使用，以使农村和欠发达地区能够得到更多的支持。

7·The only hope for underdeveloped countries is to become, as far as possible, self-reliant.

欠发达国家的惟一指望就是尽可能地做到自力更生。《柯林斯英汉双解大词典》

8·The tea market was underdeveloped.

茶叶市场不发达。

9·He found that the local tea business was very scattered (分散的). He also realized that the local tea farmers were very poor because of the underdeveloped tea market.

他发现当地的茶业特别分散，也意识到由于当地茶市的不景气，本地茶农都十分贫穷。

10·In underdeveloped countries, there are virtually no atheists.

在欠发达国家里，几乎没有无神论者。

(1)underdeveloped country不发达国家，发展中国家（等于developing country）

(1)underdeveloped region不发达区域