thorny arm spine

例句：

1. 1.The patient's spine was severely injured in the accident.
   病人的脊柱在事故中严重受伤。
2. 2.The spine of the animal is covered with sharp thorns.
   这种动物的脊柱上覆盖着尖锐的刺。
3. 3.The spine of the book is very thin and fragile.
   这本书的脊骨非常薄且脆弱。