binding up

例句：

1. 1.The children were bound up in their play.
   孩子们被他们的游戏所吸引。
2. 2.She tied up the package securely before leaving.
   她离开前把包裹绑得牢牢的。
3. 3.The horses were bound up by ropes.
   马匹被绳子束缚着。