subscriber-busy signal

英 [subscriber-busy signal]
美 [subscriber-busy signal]

中文释义

用户占线信号

单词分析

单词结构：

subscriber-busy signal

字母数：22

记忆提示

🎯 重点记忆：

  • 单词拼写：subscriber-busy signal
  • 核心含义：用户占线信号

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更新时间：2026-02-06 08:40:51