You can see the tag cloud on the right-hand side of Figure 1. It is a list of tag terms with some rendered in larger type or in boldface depending on their frequency of use.

您可以在图1的右侧看到标记云。它是标记术语的列表，一些术语字体较大或者采用了黑体，这取决于它们的使用频率。

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But you can achieve the same effect by using self-referential rules whose left-hand terms also occur on the right-hand side.

但你也可以取得同样效果，只要使用自我引用的规则，即左边的术语也出现在右边。

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