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central office exchange service
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:2026-02-04 18:54:37