轴索浆

例句：

1. 1. The neurologist examined the patient's brain and found a tumor in the axis of the brain.
   神经学家检查了病人的脑部，发现脑部有肿瘤。
2. 2. The scientist used an electron microscope to observe the axis of the crystal.
   科学家使用电子显微镜观察晶体的轴线。
3. 3. The artist painted the axis of the tree with vibrant colors.
   艺术家用鲜艳的颜色描绘了树的轴线。