vt. 笨拙地拋下；撲通放下；拍（翅）; vi. 失敗；撲拍；撲通落下；笨重地摔; n. 失敗；砰然落下；拍擊聲; adv. 撲通一聲；恰巧
fly but drop
flip：往上拋flop：往下落flip-flop：拖鞋
