a back massage的用法和样例：
- A You should take it easy and have a rest. Maybe have a back massage.
- Key phrases and sentences Are you alright? You look stiff. I hurt my back yesterday. I think I need to rest today. Maybe have a back massage.
- I am not entirely a back number, Taylor.
- There is a front and a back entrance to the house.
- The father was giving a back to the son.
- He was badly beaten up in a back alley .