“trace element”的概念、定义、翻译、参考文献-科学参考

单词	trace element
释义	trace element [`trās ´el·ǝ·mǝnt] ^{ANALYTICAL CHEMISTRY} An element in a sample that has an average concentration of less than 100 parts per million atoms or less than 100 micrograms per gram. ^BIOCHEMISTRY A chemical element that is needed in minute quantities for the proper growth, development, and physiology of the organism. Also known as micronutrient. ^GEOCHEMISTRY An element found in small quantities (usually less than 1.0%) in a mineral. Also known as accessory element; guest element.
随便看	maxillary hiatus maxillary nerve maxillary process of the embryo maxillary sinus maxilliped maxillo-alveolar index maximal analytic extension maximal breathing capacity maximal element maximal flow maximal ideal maximal member maximal planar graph maximax criterion maxim criterion maximin maximin criterion maximizing a function maximum maximum allowable working pressure maximum-and-minimum thermometer maximum angle of inclination maximum available gain maximum average power output maximum belt slope

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