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frequency primary standard
frequency primary standard
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[frequency primary standard]
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[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
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🎯 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:2026-01-30 00:29:10