“francium”的概念、定义、翻译、参考文献-科学参考

单词	francium
释义	francium Encyclopedia 理学放射性元素释 francium钫天然放射性元素，元素符号Fr，原子序数87，半衰期最长的同位素的质量数223，属周期系ⅠA族，碱金属元素。为纪念发现者M.佩雷[注]的祖国法国（France）而命名。 Astronomy francium缩写：Fr。钫 Chemistry ＞放射化学与辐射化学＞放射性元素化学＞释义 francium钫
随便看	concentration coefficient concentration compactness lemma I concentration compactness lemma II concentration compactness lemma Ⅱ concentration compactness principle concentration-compactness principle concentration constant concentration control coefficient concentration control coefficients，CCCs concentration control of pollutant concentration criterion of ore concentration cylinder concentration-dependent antibiotics concentration-dependent antimicrobial agents concentration direct reading concentration ellipse concentration equipment concentration factor concentration for 50% of maximal effect concentration function concentration gradient field concentration index concentration in situ concentration interval concentration limit

科学参考收录了854744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。