1. （假想的）轴;轴线 An axis is an imaginary line through the middle of something.
2. （坐标）轴 An axis of a graph is one of the two lines on which the scales of measurement are marked.
名词坐标轴；轴（旋转物体假想的中心线）；对称中心线（将物体平分为二）网络轴线；枢椎；轴心
