“promethium”的概念、定义、翻译、参考文献-科学参考

单词	promethium
释义	promethium Encyclopedia 理学放射性元素释 promethium钷人工放射性元素，元素符号Pm，原子序数61，半衰期最长的同位素的质量数145.0，属周期系ⅢB族，镧系元素、稀土元素。由希腊神话中从天庭盗取火送到人间的英雄普罗米修斯（Prometheus）而命名。 Physics promethium钷61Pm Astronomy promethium缩写：Pm。鉕 Chemistry ＞放射化学与辐射化学＞放射性元素化学＞释义 promethium钷
随便看	SIGNE 3 signed signed content signed deviation signed directed graph signed directed graph method signed distance signed graph signed measure signed measure space signed-minor signed number signed rank signed rank statistic signed rank test signed tree signed value signed volume signer sign function sign graph significance significance arithmetic significance level significance point

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。