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  1. nuclear fission

    • IPA[ˈn(y)o͞okli(ə)r]

    美式

    • n.
      a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.
    • noun: nuclear fission

    • 更多解釋

    英式

    • n.
      a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another ...

    Oxford Dictionary