“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	scaling scaling circuit scaling factor scaling law scaling ratio scaling symmetry scallion scallop scalloped upland scalloping scalp scalped anticline scalped extrusion ingot scalpel Scalpellidae scalping chips scaly bark scaly leg scan scan converter scandent scandia scandium scandium halide scandium oxide

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。