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解析:核能是指原子核发生变化过程中释放出来的能量。核能有两种类型,一种是重原子核(如铀)裂变为中等质量的原子核(如锶、氙)时发出的能量,叫
Analysis: Nuclear energy refers to the energy released during the change of the nucleus. There are two types of nuclear energy, one is the energy emitted when a heavy atom nucleus (such as uranium) is split into intermediate mass nuclei (such as helium and thorium).