fledgeling (also fledgling)

n 1 young bird that is just able to fly （刚会飞的）幼鸟. 2 inexperienced person 无经验的人.

flavour, flavour (US flavor), flavouring (US flavoring), flavourless (US flavorless), flaw, flawless, flawlessly, flax, flaxen, flay, flea, flea market, flea-bag, flea-bite, flea-pit, flea-ridden, fleck, fled, fledge, fledged, fledgling, flee, fleece, fleecy, fleet, fleet admiral, Fleet Street, fleeting, fleetingly, fleetness, flesh, flesh-pots, flesh-wound, fleshly, fleshy, fleur-de-lis (also fleur-de-lys), flew, flex, flexibility, flexible,