名词镨
1. Many of praseodymium's industrial uses involve filtering yellow from light sources.
2. Battery producers for electrical cars using praseodymium, neodymium and lanthanum also felt the pain of rising costs.
noun
1. a soft yellowish-white trivalent metallic element of the rare earth group
can be recovered from bastnasite or monazite by an ion-exchange process
Synonym: Pr atomic number 59