primary source of infection

英 [primary source of infection]
美 [primary source of infection]

中文释义

初侵染源

单词分析

单词结构：

primary source of infection

字母数：27

记忆提示

🎯 重点记忆：

  • 单词拼写：primary source of infection
  • 核心含义：初侵染源

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更新时间：2026-01-31 22:11:11