英语词汇primary luminous standard的读音、用法、中文释义、短语词组及例句-英汉双解词典

单词	primary luminous standard
释义	primary luminous standard 英?[?praim?ri ?lu:min?s ?st?nd?d] 美?[?pra??m?ri ?lum?n?s ?st?nd?d] 释义发光源标准; 发光原标准
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