somebody or something that serves as a substitute, auxiliary, or alternative
somebody or something that gives support or is ready to if called upon
in computing, the process of backing up data, or a copy of data made in this way
| 单词 | backup |
| 释义 | backupnounsomebody or something that serves as a substitute, auxiliary, or alternative somebody or something that gives support or is ready to if called upon in computing, the process of backing up data, or a copy of data made in this way |
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