Moving on to the next heading, you apply a very simple styling to it. It just has a color for the text, and a separate color for the background.
继续移动到下一个标题，对它应用一个非常简单的样式：文本一种颜色，背景另一种颜色。
To make the top-level heading really stand out, the example layout puts a page break and a horizontal line before the text. Here are the formatting choices used.
为了使顶级标题真正突出，该示例布局在文本之前放置了一个分页符和一条水平线。
A topic is, simply, a chunk of information consisting of a heading and some text, optionally divided into sections.
简而言之，主题就是包括标题和一些文本的信息块，可能还分解成不同的章节。
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