If two axes are shown in a bar chart, and some data series are attached to the first axis, while some other data series are attached to the second axis, then both sets of data series are shown independently, overlapping each other.
如果在条形图中显示两个轴，且一些数据序列附属于主轴，当一些其他的数据序列附属到次轴时，附属于不同轴的数据序列将独立显示，相互重叠。