“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	observation of ground pressure observation of livestock growth and development observation of navigation obstruction observation of reservoir sediment observation of seismic response of structures observation of slope stability observation of surrounding rock structure observation platform observation point control observation process observation route control observation scheme observation technology of gravity tide observation technology of strain tide observation, thinking and experiments observation vector observation window Observatoire de Paris Observatoire de Paris，PSL/Paris Observatory Observatoire Royal de Belgique Observatoire Virtuel France Observatorio del Roque de los Muchachos Observatorio del Teide Observatory observatory

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。