Because these are drawn in-order, if there are elements that overlap positions, the last one to be drawn will lieontopof others previously drawn to that space.
因为它们是按次序绘制的,若是有一些元素复盖了地位,最后的那个将绘制在其他的先前绘制的上方。
3
Lieon the roller with your knees bent and your feet on the floor, so the roller extends along your spine from your sitting bones to the topof your head.