发育不完全

例句：

1. 1. Thebaby's development was significantly delayed due to a lack of proper nutrition.
   由于缺乏适当的营养，婴儿的发展明显滞后。
2. 2.The forest is an important habitat for many species of plants and animals that are underdeveloped in their native environments.
   森林是许多原生环境中发展不充分的植物和动物的重要栖息地。
3. 3. The government has launched a campaign to promote the development of underdeveloped regions.
   政府已经发起了一场运动，旨在促进发展中地区的开发。