axial mesoderm

例句：

1. 1. The axis of the vertebrate body is the spinal column.
   脊椎动物的身体轴线是脊柱。
2. 2. The axis of symmetry in this figure is the vertical line through the center.
   这个图形的对称轴是通过中心的垂直线。
3. 3. The axis of rotation for this joint is perpendicular to the plane of movement.
   这个关节的旋转轴与运动平面垂直。