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primary frequency standard
primary frequency standard
英
[primary frequency standard]
美
[primary frequency standard]
中文释义
一级频率标准;基本频率标准
单词分析
单词结构:
primary frequency standard
字母数:26
记忆提示
🎯 重点记忆:
单词拼写:primary frequency standard
核心含义:一级频率标准;基本频率标准
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更新时间:2026-03-18 00:09:49