| 释义 |
atomic number 72
基本英英
英Noun:a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals；used in filaments for its ready emission of electrons
Noun:
a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons |