swing on的用法和樣例：
例句
- The children were swinging on a rope.
孩子們抓著(zhù)繩子蕩來(lái)蕩去。 - A movable structure used to close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates.
門(mén)一種用于關(guān)閉入口活動(dòng)裝置，典型的由一塊板上有鉸鏈轉動(dòng)或為拉動(dòng)式或為旋轉式的組合
