医生检查了他的颈椎。

The doctor examined his neck ___vertebrae.

医生发现他的颈椎有一节脊椎骨错位了。

The doctor found a misalignment in one of his cervical ___vertebrae.

医生检查后发现他有两节脊椎骨受伤了。

The doctor found that two of his ___vertebrae were injured during the examination.