如果字体、文件、样式、屏幕颜色、修订信息，以及摘要信息组包含着文档格式化属性，那么它们必须在第一块纯文本之前被定义。
If the font, file, style, screen-color, revision mark, and summary-information groups and document-formatting properties are included, they must precede the first plain-text character in the document.
如果字体、文件、样式、屏幕颜色、修订信息，以及摘要信息组包含着文档格式化属性，那么它们必须在第一块纯文本之前被定义。
If the font, file, style, screen-color, revision mark, and summary-information groups and document-formatting properties are included, they must precede the first plain-text character in the document.
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