axis

陀螺围绕它的轴心快速旋转。

The top spins rapidly around its ___axis.

这三个国家组成了新的军事轴心。

The three countries formed a new military ___Axis.

在图表中，x轴和y轴垂直相交。

In the graph, the x-___axis and y-___axis intersect perpendicularly.