A pie chart is drawn by dividing a circular diagram into segments . it shows the relative shares of the component parts of the whole 扇形图是将一圆形图分成几部分。它表示的是组成一个整体的相关部分。
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Or if you decide that the workflow you are presenting is really a repetitive process you might switch from a simple horizontal flow diagram to a circular diagram 或者，如果你觉得你要展示的工作流程确实是个重复性的过程，那么你可以从一个简单的水平流程图切换到一个环形图。
