背阳性

例句：

1. 1. She had back pain from sitting for too long.
   她因为坐得太久而背部疼痛。
2. 2. He suffered from chronic back pain due to poor posture.
   由于姿势不当，他长期遭受慢性背痛的困扰。
3. 3. The doctor prescribed medication to alleviate her back pain.
   医生开了药来缓解她的背痛。