“rare earth element”的概念、定义、翻译、参考文献-科学参考

单词	rare earth element
释义	rare earth element Encyclopedia 理学稀土元素释 rare earth element稀土元素元素周期表ⅢB族中原子序数为21、39和57～71的17种化学元素的总称。稀土元素的化学符号用RE代表。又称稀土金属。包括钪Sc、钇Y、镧La、铈Ce、镨Pr、钕Nd、钷Pm、钐Sm、铕Eu、钆Gd、铽Tb、镝Dy、钬Ho、铒Er、铥Tm、镱Yb、镥Lu。其中57～71号元素称为镧系元素，位于元素周期表最下方的f区。从镧到铕为铈组（轻稀土），从钆到镥及钇为钇组（重稀土）。 Chemistry ＞无机化学＞无机化学基本概念与无机化合物＞释义 rare earth element稀土元素
随便看	public security emergency command communication public security emergency communication technology public security emergency support public security equipment guarantee public security establishment public security intelligence public security intelligence analysis public security intelligence assessment public security intelligence collection public security intelligence consciousness public security intelligence cooperation public security intelligence failure public security intelligence management public security intelligence product public security intelligence requirement public security intelligence safety public security intelligence service public security intelligence staff public security intelligence system public security intelligence users public security intelligence work public security internet of things application demonstration project public security mobile command public security mobile command system public security organs' system of invited supervisors

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。