supporting back

例句：

1. 1. She was supporting her back while she walked.
   她走路时在支撑背部。
2. 2.The doctor advised him to support his back during the recovery process.
   医生建议他在康复过程中要支撑背部。
3. 3. He sat down on a chair and supported his back with his hands.
   他坐在椅子上，用手支撑着背部。