In this paper, it presents a digital watermark protocol used for copy tracing.
提出了用于盗版追踪的数字水印协议。
A Workspace does not contain a copy of its parent content: if it did, then the objects would have to have unique GUIDs, and this would destroy the capability of easy tracing.
一个工作区并没有包含其上级内容的拷贝：如果它包含了，那么对象必须拥有独一无二的GUIDs，而这又将破坏轻松追踪的功能。
Digital fingerprinting is a technique for identifying unauthorized copy and tracing back to its user.
数字指纹技术是一种用来辨认非法拷贝，追踪非授权用户的新技术。
Remove tracing paper to find exact copy of original draft.
移开复描纸，就可以看到与原图一模一样的复版。
Remove tracing paper to find exact copy of original draft.
移开复描纸，就可以看到与原图一模一样的复版。
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