retractible

例句：

1. 1.The chair is retractable, so it can be folded up and stored when not in use.
   椅子是可收回的，所以不用时可以折叠起来储存。
2. 2.The retractable roof of the car provides shade during hot weather.
   汽车的可收回式车顶在炎热的天气中提供遮阳。
3. 3.The retractable awning on the beach provides shade for guests during the day.
   海滩上的可收回遮阳伞为客人提供了白天的阴凉。