“praseodymium”的概念、定义、翻译、参考文献-科学参考

单词	praseodymium
释义	praseodymium [´prā·zē·ō`dim·ē·ǝm] ^CHEMISTRY A chemical element, symbol Pr, atomic number 59, atomic weight 140.91; a metallic element of the rare-earth group.
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