经实验证明，对水印文本进行格式调整、特征修改甚至部分内容删除等操作均不能去除水印。

It shows according to experiments that the watermark cannot be wiped off with the format adjusting, characteristic amending or contents' deleting.

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它把文本内容视为一个语义的整体，并且借助一些已经定义的语义转换嵌入水印信息。

Considering the content of text as a semantic integral, it embeds watermarks into the text via the use of existing semantic conversion techniques.

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针对现有英文文本数字水印方法存在的不足，提出并实现了一种基于字符属性及单词内容的多重文本数字水印算法。

For the deficiency of current digital watermarking methods for English texts, the paper proposes a multiple text watermarking method which is based on the characters' attribute and the words' content.

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