1. A feather that is not yet fully grown; fledgeless, (figuritive) a person is too young, thus not experienced or knowledgeable, nor strong. 他年龄尚小,羽毛未丰,看起来就是一副很稚气的样子。
2. 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。