| 单词 | hf |
| 释义 | Hf 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 hafnium Hypernyms:metal metallic element Inherited Hypernyms:hafniummetallic elementchemical elementsubstancematterphysical entityentity Inherited Hypernyms:hafniummetallic elementchemical elementsubstancepartrelationabstractionentity nnoun.attribute3 to 30 megahertz Synset:HF high frequency Part Holonyms:electromagnetic spectrum Hypernyms:radio frequency Inherited Hypernyms:high frequencyradio frequencyfrequencyratemagnitude relationrelationabstractionentity |
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