锥骨

例句：

1. 1. The scientist studied the structure of the human spine.
   这位科学家研究了人类脊柱的结构。
2. 2. He had to bend his back to reach the high shelf.
   他不得不弯腰去够那个高架子。
3. 3. The doctor advised him to exercise regularly to maintain his spine health.
   医生建议他定期锻炼以保持脊柱健康。