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单词 atomic number 84
释义
Atomic Number 84
nnoun.substancea radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor
Synset:Po polonium
Hypernyms:metal metallic element
Inherited Hypernyms:poloniummetallic elementchemical elementsubstancematterphysical entityentity
Inherited Hypernyms:poloniummetallic elementchemical elementsubstancepartrelationabstractionentity
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更新时间:2024/12/23 9:51:56