英语词汇“backup”的意思、释义、用法及双语翻译-时代网

词汇	backup
释义	noun The police had backup from the army. 警方得到了军方的增援。 We can use him as a backup if one of the other players drops out. 如果有参赛者退出，我们可以用他作为替补。 a backup power supply备用电源 Always make a backup of your work. 所有文件都须备份。 a backup copy备份文件 The hospital has a backup power supply. The police called for backup from the army. We can use him as a backup if one of the team can’t play.
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