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atomic number 84    我要挑错精准翻译

参考词典中atomic number 84的常规释义:

英英解释
  •  1个名词解释

    1. a 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
      [同] atomic number 84, po, polonium
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