双代号网络图 meaning in English

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The large number of nodes and their indefinite relationship result in the complicated drawing course of double code network diagram
摘要在双代号网络图的绘制过程中，由于节点的数量较多并且节点之间的相互关系不明确，从而导致绘图过程比较困难和复杂。
In order to the target , we need research the problem as follows ; the study of the algorithm of the function in arranging dots in double - dotted network picture ; study of network picture editor ; study of drawing network picture leaf by leaf
为了达到上述目标，需要研究以下一些内容：双代号网络图自动布点算法的研制；网络图形编辑器的研制；网络图分页绘制算法及程序的研制。