manual telephone exchanging system

英 [manual telephone exchanging system]
美 [manual telephone exchanging system]

中文释义

人工电话交换制

单词分析

单词结构：

manual telephone exchanging system

字母数：34

记忆提示

🎯 重点记忆：

  • 单词拼写：manual telephone exchanging system
  • 核心含义：人工电话交换制

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更新时间：2026-02-04 22:30:04