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on-hook signal
on-hook signal
英
[on-hook signal]
美
[on-hook signal]
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挂机信号
单词分析
单词结构:
on-hook signal
字母数:14
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🎯 重点记忆:
单词拼写:on-hook signal
核心含义:挂机信号
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更新时间:2026-02-03 02:51:10