/,ʌndɪ'veləpt; ,ʌndɪ`vɛləpt/
adj
1 not fully grown or developed 未充分发育的; 未发展的; 不发达的
*undeveloped fruit, muscles, organs 未成熟的水果、不发达的肌肉、发育不良的器官.
2 not yet used for agriculture, industry, building, etc 尚未用于农业、工业、建筑业等的; 未开发的
*undeveloped land 未开发的土地
* undeveloped resources, sites 未开发的资源、地点.

adj
used in order to describe land which has not yet been used for building, farming etc
　an undeveloped stretch of coastline
used in order to describe a country or area that does not have modern industry, and usually has a low standard of living
→underdeveloped
　the undeveloped regions of the world
not fully grown
　a child's undeveloped mind