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。

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The client had no test scripts and no way of tracing back what they were testing to what was an initial requirement.

客户们没有测试脚本，也没有对办法对他们所测试的内容追溯到最初的需求。

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You'll use these arrows later in "tracing back" to construct an actual LCS (as opposed to just discovering the length of one).

后面的“回溯”一节将用这些箭头建立实际的LCS(与仅仅发现LCS长度相反)。

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And tracing back where it came from can be really hard.

然后去查找问题来源,可能会很困难。

麻省理工公开课 - 计算机科学及编程导论课程节选

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