give back
1．return；reflect 返回；反射
This chamber gives back a marvellous echo．这个房间能反射一种奇妙的声音。
The two opposite mirrors gave back many parallel images．两面对照的镜子反映出许多相同的形象。
2．allow to enjoy again（health，freedom，liberty，etc．）恢复（健康、自由等）
There was nothing the doctors could do to give me back the use of my legs．医生已没有办法使我的腿恢复功能。
They gave those people back their freedom．他们恢复了那些人的自由。
Living in the country has given me back my health．居住在乡村使我恢复了健康。
3．withdraw from a position or a place；retreat 向后站；后撤；后退
The crowd gave back to let the policemen through．人群向后退让警察走过去。