“primary standard”的概念、定义、翻译、参考文献-科学参考

单词	primary standard
释义	primary standard [`prī´mer·ē `stan·dǝrd] ^{SCIENCE AND TECHNOLOGY} A unit directly defined and established by some authority, against which all secondary standards are calibrated; for example, in analytical chemistry, reference substances or solutions of known chemical purity and concentration are used to standardize laboratory solutions prior to volumetric analysis or titration.
随便看	microgammil microgamy microgastria microgenesis microgenitalism microgeography microglia microglossia micrognathia microgram micrograph micrographic micrographics microgroove record microgyria microhabitat microhardness microheterogeneity microhm microholography Microhylidae microhysteresis effect microimage microincineration microinfarct

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