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free radical
Word forms: plural free radicals
N-COUNT [usually plural] 自由基;游离基 Free radicals are atoms that contain one or more unpaired electrons. Free radicals are believed to be a cause of ageing, heart disease, and some cancers. 自由基;游离基 [technical]

See also: free radical

free radical
Atoms and parts of atoms: alpha particle, anion, antiparticle...

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