英语词汇primary standard sample怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	primary standard sample
释义	primary standard sample 简明释义一级标准样网络释义 1 ?一级标样 ... primary standard pyrheliometer 基准直接日射表 primary standard sample 一级标样 primary standard sound source 原标准声源 ... 2 ?原始标准试样原始标准试样 primary standard sample 工作标准物质 working standard substance .. 双语例句 1 Two primary standard reference fuels, normal heptane and iso-octane arbitrarily assigned 0 and 100 octane number, respectively, are then blended to produce the same knock intensity as the test sample. 两种基准参考燃料正庚烷和异辛烷分别被定义成辛烷值为0和辛烷值为100，将它们混合产生与实验样本相等敲缸强度的爆震。
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