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首页 - 英汉词典 - S字开头的单词或词组 - secondary standard

英语解释

secondary standard

汉语翻译

【化】二级标准

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secondary standard substance secondary standard reference surface secondary standard fuel secondary standard file secondary-tertiary alcohol secondary-emission tube secondary-emission ratio secondary-electron multiplier secondary(optical)axis secondary' digestion secondary yolk cells secondary xylem

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