However we will look at creating a graph from scratch in the next section.
不过，我们将在下一个部分中了解如何从头创建图表。
One simple example is creating a graph where vertices are represented by a website's pages and edges exist between pages containing links to other pages.
一个简单的例子是创建这样一个图，顶点表示网站中的网页，而边表示页面指向另一个页面的链接。
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