浏览器目前似乎不支持内部子集中的外部实体或参数实体，这也许是一个安全措施。
Browsers don't seem to currently support external or parameter entities in the internal subset, probably as a security measure.
浏览器目前似乎不支持内部子集中的外部实体或参数实体，这也许是一个安全措施。
Browsers don't seem to currently support external or parameter entities in the internal subset, probably as a security measure.
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