primary photoelectric standard

英 [primary photoelectric standard]
美 [primary photoelectric standard]

中文释义

un. 光度基准

单词分析

单词结构：

primary photoelectric standard

字母数：30

记忆提示

🎯 重点记忆：

  • 单词拼写：primary photoelectric standard
  • 核心含义：un. 光度基准

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更新时间：2026-02-07 10:24:04