v.搖擺, 擺動, 回轉, 旋轉 ; n.秋千, 搖擺, 擺動
【記】源於︰sway ( v.搖擺 )
swing v.搖擺；n.秋千【類】oscillation:swing＝momentum:scooter振蕩使秋千搖擺＝動力使滑行車前進
