1. 长羽毛：neutral 中立的; 中立 | fledge 长羽毛 | maximise 最大化

2. 喂养：edge 边缘 | fledge 喂养 | ducking 小鸭子

3. 喂养/用羽毛盖上/装上羽毛/长羽毛：fled /逃避/ | fledge /喂养/用羽毛盖上/装上羽毛/长羽毛/ | fledged /羽毛长齐的/快会飞的/随时能飞的/

4. 用羽毛盖上：fledge 喂养 | fledge 用羽毛盖上 | fledge 装上羽毛

verb

1. grow feathers

e.g. The young sparrows are fledging already

Synonym: feather

2. decorate with feathers

e.g. fledge an arrow

Synonym: flight

3. feed, care for, and rear young birds for flight