英语词汇back up的意思翻译、读音、音标、释义-英汉词典-范文网

单词	back up
释义	请查阅词条：back sth↔up
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英汉词典包含238766条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。