primary protective barriers

英 [primary protective barriers]
美 [primary protective barriers]

中文释义

主防护墙

单词分析

单词结构：

primary protective barriers

字母数：27

记忆提示

🎯 重点记忆：

  • 单词拼写：primary protective barriers
  • 核心含义：主防护墙

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更新时间：2026-03-18 09:59:58