| 单词 | atomic number 73 |
| 释义 | atomic number 73 (extremely rare) n WORD FAMILY atomic number 73 n a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite Syn|Hyper Ta, tantalum 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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