well developed
adjective uk/ˌwel dɪˈvel.əpt/ us/ˌwel dɪˈvel.əpt/
发展良好的；发育良好的；健全的
having grown or increased in a positive way
These areas are less well developed and so less attractive as investment prospects. 这些地区欠发达，在投资前景方面远没有那么有吸引力。
[ before noun ] She is a physically well-developed teenager with the mental level of a four-year-old. 她是一个身体发育良好的少年，可是智力水平只相当于4岁大的孩子。