Learn English free online - how to pronounce word in English - English Learning Online- www.pronounceword.com
atomic number 59
n.
a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
同义词:
praseodymium
Pr
网络释义
短语
专业释义
英英释义
atomic number 59
n.a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process 同义词:praseodymiumPr
英汉双解大词典