a real or imaginary straight line which goes through the centre of a spinning object , or a line which divides a symmetrical shape into two equal halves , or a line on a graph used to show the position of a point
发音
例句
1. The earth's axis is the line between the North and South Poles. 地轴是南北极之间的线。 2. The axis of a circle is its diameter. 圆的轴线是其直径。