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单词 hafnium
释义
Hafnium
nnoun.substancea grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
Synset:Hf atomic number 72
Hypernyms:metal metallic element
Inherited Hypernyms:hafniummetallic elementchemical elementsubstancematterphysical entityentity
Inherited Hypernyms:hafniummetallic elementchemical elementsubstancepartrelationabstractionentity
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更新时间:2024/12/23 18:28:46