secondary standard

英 [secondary standard]
美 [secondary standard]

中文释义

[化] 二级标准

单词分析

单词结构：

secondary standard

字母数：18

记忆提示

🎯 重点记忆：

  • 单词拼写：secondary standard
  • 核心含义：[化] 二级标准

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更新时间：2026-03-18 09:02:26