形容词羽毛未丰的，未成熟的
911chaxun查询·英语单词大全
1. 羽毛未丰的：fleckless 无斑点的 | fledgeless 羽毛未丰的 | fleshless 无肉体的
1. So far our country's land banking system is still in its fledgeless stage, and related research has not concluded with well-established theory. 由于我国土地储备制度在发展上还处于初期阶段，无论在理论上还是在实践上，对土地储备制度的研究均未形成成熟的理论体系。
adj
1. (of an arrow) not equipped with feathers
e.g. shot an unfledged arrow
Synonym: unfledged unvaned