frequency primary standard

英 [frequency primary standard]
美 [frequency primary standard]

中文释义

频率原级标准

单词分析

单词结构：

frequency primary standard

字母数：26

记忆提示

🎯 重点记忆：

  • 单词拼写：frequency primary standard
  • 核心含义：频率原级标准

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更新时间：2026-01-27 03:55:25