cacroiliac joint

例句：

1. 1. He had to have surgery on his cacroiliac joint.
   他不得不对他的骶骨关节进行手术。
2. 2. The doctor advised him to take care of his cacroiliac joint.
   医生建议他要好好照顾他的骶骨关节。
3. 3. The patient was in pain due to a damaged cacroiliac joint.
   病人由于骶骨关节受损而疼痛。