记住，这个实体引用是通过DTD引用来解析的，并且在运行时它可以转换为文本内容、更多的XML内容或其它内容。

Remember that this entity reference is resolved through a DTD reference, and that at runtime it may turn into textual content, more XML content, or anything else.

youdao

在转换过程中保证了数据的实体完整性、域完整性以及引用完整性。

In the conversion process, it ensures the entity integrity of the data, domain integrity and referential integrity.

youdao