Từ điển trực tuyến - Online Dictionary
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English - Vietnamese Dictionary
  • danh từ
    • sự hỗ trợ
    • sự dự trữ
Advanced English Dictionary
+ noun [U, C]
1 extra help or support that you can get if necessary: The police had back-up from the army. + We can use him as a back-up if one of the other players drops out. + a back-up power supply
2 (computing) a copy of a file, etc. that can be used if the original is lost or damaged: Always make a back-up of your work. + a back-up copy

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