The outline information and closed graph information of view plays an important role in processing graphics.
视图轮廓信息和封闭图形信息在图形处理中有着重要的作用。
Once the outline of a graph needed to be calculated is copied on a touch screen, the desired result can be obtained on a display.
只要在触摸屏上临摹出要求算的图形外形轮廓，就能在显示器上得到所需要的结果。
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