adj. （国家或地区）不发达的，经济落后的；发育不全的；（胶卷）显影不足的
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
词根：underdevelop
n.
underdevelopment 不发达；[摄] 显影不足
vi.
underdevelop 显影不足；发展不完全
vt.
underdevelop 使发展不完全；使显影不足
1.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。
2.But China's insular financial system has also kept it underdeveloped.
但是，中国金融系统的封闭性也导致它不够发达。
3.Soaring car-ownership is leaving the country's underdeveloped roads increasingly gridlocked.
上升的汽车拥有率使得国家落后的道路日益拥堵。
4.Puny demand was partly the result of small wage rises, but it was also because Germany's service sector is underdeveloped.
需求不足一方面是由工资涨幅过小导致的，然而，另一方面是德国服务业不发达。
5.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。
6.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。
7.Lumbering is very important in some underdeveloped countries.
在一些不发达的国家，伐木业十分重要。
8.Both countries have relatively underdeveloped civil societies.
两个国家都有相对发育不全的民权社会。