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free radical
noun [C] science
singularfree radical
pluralfree radicals
  1. a molecule that has an extra electron and can react very easily with other molecules. Free radicals sometimes form in the human body and can cause cancer. 自由基,游离基(一种有多余电子、易与其他分子发生反应的分子,有时可在人体内形成并引发癌症)
     Synonyms and related words
    Atoms and parts of atoms: alpha particle, anion, antiparticle...

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