考研英语大纲常考词组短语 backup copy


释义：

backup copy [印刷] 副本；备份件

例句：


Chances, are, however, you keep a backup copy of your operating system on an optical disc in the desk drawer, just in case.



The goal, says Real Networks Vice President Jeff Chasen, is to do away with space-consuming discs and let users create a backup copy of their video collection.



So, periodically, whenever network traffic permits, the endpoint and the cloud should have a handshake, during which the endpoint updates the cloud with a backup copy of any files unique to that endpoint.



Amazon MP3 purchases - including music that customers purchased in the past - are automatically saved to Cloud Player, which means that customers have a secure backup copy of the music they buy from Amazon, free of charge.