back-up source

英 [back-up source]
美 [back-up source]

中文释义

后备电源

单词分析

单词结构：

back-up source

字母数：14

记忆提示

🎯 重点记忆：

  • 单词拼写：back-up source
  • 核心含义：后备电源

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更新时间：2026-03-19 05:00:16