national reference standard

英 [national reference standard]
美 [national reference standard]

中文释义

家参照标准

单词分析

单词结构：

national reference standard

字母数：27

记忆提示

🎯 重点记忆：

  • 单词拼写：national reference standard
  • 核心含义：家参照标准

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更新时间：2026-01-30 05:41:03