As with HTML and other CSS-supporting formats, you can either specify CSS information inline or as a reference to an external stylesheet. A very simple example of inline CSS is.
对于HTML和其他支持CSS的格式，既可以指定内嵌CSS信息，也可以作为对外部样式表的引用。
For instance, suppose you're debugging a stylesheet that seems to have trouble when a paragraph contains an inline image.
比方说，如果要调试一个只有遇到包含行内图像的段落时才会出现问题的样式表。
Stylesheets load in parallel, but if you have a stylesheet followed by an inline script, parallel downloads are broken.
样式表并行加载，但是如果您有一个行内脚本跟随着样式表，并行下载规则被破坏。
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