The idiom "paper trail" originates from the literal use of the word "trail" to refer to a track or path, and "paper" in this context signifies the written documentation that leaves a trace or path of evidence. The term has been in use since at least the early 20th century. This expression is used to describe a series of documents, records, or written evidence that chronicles a sequence of events or transactions.

What is the origin of the idiom "paper trail" and when to use it?

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“paper trail”的英语定义和含义

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