In a document copying machine, a means by which parts of the image of the original is obscured so that it is not produced onto the copy material.

文件复印机上使用的一种方法，将原件映象的某一部分掩盖起来，使其不复印到复印件上。

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Please make a copy of this material.

请你把这个材料照抄一份。

《新英汉大辞典》

The evidence they have now collected suggests it was last November that somebody working in a high-security facility inside a US military base in Iraq started to copy secret material.

他们现在所收集的证据表明，美国伊拉克某军事基地一个高级别安全部门内，去年11月就有人开始复印秘密材料。

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The church, which considers it sacrilegious for the uninitiated to read its confidential scriptures, got a restraining order, but the Los Angeles Times obtained a copy of the material and printed a summary.

NEWYORKER: The Apostate

The SD side looked overly artificially blurred to me, so it would have been way better to just throw in a SD DVD copy of the same material to compare different formats, but oh well.

ENGADGET: HD-DVD Roadshow: a readers impressions HD

The case has become a major embarrassment for Canada as its military and government struggle to explain how the former navy officer was able to use such primitive methods to copy and convey his material and remain undetected for so long, our correspondent adds.

BBC: Prison for Canadian navy officer turned Russian spy