underdeveloped

adj.

未充分发育或发展的；（国家等）经济不发达的；足的；

v.

（使）发展不完全，（使）显影不足( underdevelop的过去式和过去分词)；

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

underdeveloped region不发达区域

1. He had underdeveloped lungs, like a premature baby.
   它像一个早产的婴儿，肺部发育不全。
2. In rare cases, these organs are underdeveloped or missing.
   在罕见的案例里，这些器官发育不良或缺乏。
3. Lumbering is very important in some underdeveloped countries.
   在一些不发达的国家，伐木业十分重要。
4. The project will encompass rural and underdeveloped areas in China.
   这项工程将覆盖中国的农村和不发达地区。”

Commercial Policy in Underdeveloped Countries
Commercial Policy in the Underdeveloped Countries
Problems of capital formation in underdeveloped countries /
Transport Expansion in Underdeveloped Countries: A Comparative Analysis
Transport Expansion in Underdeveloped Countries: A Comparative Analysis
Financial Development and Economic Growth in Underdeveloped Countries
A Theory of the Low-Level Equilibrium Trap in Underdeveloped Economies
o -Quinone methides: intermediates underdeveloped and underutilized in organic synthesis
ChemInform Abstract: o-Quinone Methides: Intermediates Underdeveloped and Underutilized in Organic Synthesis
SOME CONSIDERATIONS OF TOURISM LOCATION IN EUROPE: THE PERIPHERAL REGIONS-UNDERDEVELOPED COUNTRIES-RECREATION AREAS