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词汇 back-up
释义 ˈback-up
noun
1 [U] extra help or support that you can get if necessary 额外的援助或支持;后备支援: The police officer requested urgent back-up from the rest of the team. 警察要求得到队里其他人员的紧急支持。
2 [C] (computing计算机技术) a copy of a computer disk that you can use if the original one is lost or damaged (计算机磁盘的)后备副本,备份: Always make a back-up of your files. 每次都要为计算机文件复制副本。
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更新时间:2025/5/29 12:21:22