脊椎

例句：

1. 1. The human body has a skeletal structure, with the vertebrae forming the spinal column.
   人类身体具有骨骼结构，椎骨形成了脊柱。
2. 2. The spine is responsible for supporting the weight of the upper body and protecting the nervoussystem.
   脊柱负责支撑上半身的重量并保护神经系统。
3. 3. During exercise, it's important to maintain good posture and not strain the spine.
   在锻炼时，保持良好姿势并避免拉伤脊柱很重要。