retrocollis

例句：

1. 1. The patient's back was severely deformed due to a retrocollis.
   病人的背部严重变形，是由于脊椎退行性变造成的。
2. 2.During the surgery, the surgeon had to correct the patient's retrocollis.
   手术期间，外科医生不得不纠正患者的脊椎退行性变。
3. 3. The elderly woman suffered from chronic retrocollis and needed regular physical therapy.
   这位老人患有慢性脊椎退行性疾病，需要定期进行物理治疗。