| 单词 | atomic number 59 |
| 释义 | atomic number 59 (extremely rare) n WORD FAMILY 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 Syn|Hyper Pr, praseodymium metal, metallic element any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
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