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nuclear fission

noun
🔊/ˌnjuːkliə ˈfɪʃn/
🔊/ˌnuːkliər ˈfɪʃn/
(also fission)
[uncountable] (physics物理)
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  1. the act or process of splitting the nucleus (= central part) of an atom, when a large amount of energy is released（核）裂变，分裂Topics Physics and chemistryc2