如同前面指出的那样，在内容模型中应该使用元素实体而不是文字元素名称。
As noted previously, you should use element entities instead of literal element names in content models.
观赏者必须感觉到它是一个单一的实体形态，而完全不靠它的食用意义或它会变成鸟这样的文字概念来感觉。
He must, for example, perceive an egg as a simple single solid shape, quite apart from its significance as food, or from the literary idea that it will become a bird.
字符和已解析实体引用替换为文字字符(特殊字符除外)。
Character and parsed entity references are replaced with the literal characters (excepting special characters).
如同你所看到的，在你的站点中有很多文字实体的使用。
As you have seen, there are a many USES for character entities within your site.
前封面文字和后封面文字都只能有一个段落，可以经由任何一个实体，或经由任何一个实体所作出的安排而被加入。
Only one passage of Front-Cover Text and one of Back-Cover Text may be added by (or through arrangements made by) any one entity.
如果文件已经在同样的封面包括了封面文字--先前由你或由你所代表的相同实体所作出的安排而加入，则你不可以增加另外一个；
If the Document already includes a cover text for the same cover, previously added by you or by arrangement made by the same entity you are acting on behalf of, you may not add another;
它是一种“内容实体”。例如读英文版的“低温物理学”、“神经生理学”，文字与语言所占的角色是很次要的。
It forms the content itself, like English edition of "Low-Temperature Physics" or "Nerve Physiology." In this case, the role of language and style is only secondary.
它是一种“内容实体”。例如读英文版的“低温物理学”、“神经生理学”，文字与语言所占的角色是很次要的。
It forms the content itself, like English edition of "Low-Temperature Physics" or "Nerve Physiology." In this case, the role of language and style is only secondary.
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