primary standard
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primary standard
英
[primary standard]
美
[primary standard]
中文释义
[化] 基本标准物质
单词分析
单词结构:
primary standard
字母数:16
记忆提示
🎯 重点记忆:
- 单词拼写:primary standard
- 核心含义:[化] 基本标准物质
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更新时间:2026-08-30 15:33:16