The system can effectively prevent illegal copy of DVD disc.

该系统可有效防止对DVD盘片的非法拷贝。

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This disk may be damaged, write protected, or an illegal copy.

该磁盘可能已损坏、写保护或是非法副本。

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What teenager has not gone online to snatch an illegal copy of a song?

FORBES: Magazine Article

To the record industry an illegal copy is an illegal copy is an illegal copy, no matter what equipment you're using.

ENGADGET: Cell carriers about to get Napsterized? So what?

The most common type of counterfeiting is called skimming, where the data on a card's magnetic stripe is electronically copied and used to make an illegal copy of a genuine card.

BBC: Two credit cards