central axis的用法和样例：
例句
- The force to be measured must be applied concentrically along the central axis as far as possible.
所测量的力必须尽可能集中地沿着中心轴施加。 - The orientation of the minor axis of the ellipses is the same as that of the central axis, and is perpendicular to its surface.
椭圆的辅助轴方向与中心轴相同，并且垂直于其表面。
