protected opening

英 [protected opening]
美 [protected opening]

中文释义

设防洞口

单词分析

单词结构：

protected opening

字母数：17

记忆提示

🎯 重点记忆：

  • 单词拼写：protected opening
  • 核心含义：设防洞口

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更新时间：2025-12-10 17:30:43