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单词 atomic number 87
释义
Atomic Number 87
nnoun.substancea radioactive element of the alkali-metal group discovered as a disintegration product of actinium
Synset:Fr francium
Hypernyms:metal metallic element
Inherited Hypernyms:franciummetallic elementchemical elementsubstancematterphysical entityentity
Inherited Hypernyms:franciummetallic elementchemical elementsubstancepartrelationabstractionentity
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