central office exchange service

英 [central office exchange service]
美 [central office exchange service]

中文释义

集中小交换业务

单词分析

单词结构：

central office exchange service

字母数：31

记忆提示

🎯 重点记忆：

  • 单词拼写：central office exchange service
  • 核心含义：集中小交换业务

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更新时间：2026-02-05 05:59:15