swing on

例句：

1. 1.She was swinging on the swing set when her brother came over.
   当她的哥哥过来时，她正在荡秋千。
2. 2. The kids were having a great time swinging on the swings in the park.
   孩子们在公园里荡秋千玩得很开心。
3. 3.After dinner, they decided to swing on the swings in the backyard.
   晚餐后，他们决定在后院荡秋千。