1. She unpinned her hair and let it fall loose around her shoulders.
她解开了夹住头发的别针，让头发自由地散落在肩上。

2. Don't forget to unpin the map from the bulletin board when you're done.
完成后别忘了将地图从公告板上取下来。

3. The astronaut carefully unpinning himself from the spaceship and floated into space.
宇航员小心翼翼地从宇宙飞船上解开固定，漂浮到太空中。