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   Angielski
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 Angielski tezaurus
radioactivity [ˌreɪdiəʊæk'tɪvəti, -oʊæk'tɪvət̬i] skr.
skr. ra
wojsk. The property of a material emitting ionizing radiation
wojsk., logist. Emission of radiations produced by the nucleus of the atom disintegration. (FRA)