fission products (radioactive nuclei)
/ˈfɪʃən ˈpɹɒdʌkts ɹˌeɪdɪəʊˈaktɪv ˈnjuːklɪi/
n
中文：裂变产物
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Meaning：The nuclei of unstable atoms produced by fission emit rays that can be harmful to living organisms.