她的宽松衬衫在微风中轻轻飘动。

Her ___flappy shirt fluttered gently in the breeze.

那只鸟有对松软的翅膀，飞起来总是扑腾个不停。

The bird had ___flappy wings that kept fluttering as it flew.

我妹妹沉迷于玩那个点击屏幕让小鸟飞行的游戏。

My younger sister is addicted to playing that ___flappy bird game where you tap to fly.