根据柯林斯英汉双解大词典[1]
1.N-UNCOUNT Nuclear fission is the splitting of the nucleus of an atom to produce a large amount of energy or cause a large explosion. 核裂变
fission reactor[核]裂变反应堆
fission chamber[核]裂变室 ; 裂变电离室 ; 分裂腔 ; 分裂室
fast fission[核]快中子裂变 ;[核]快裂变 ; 快中子分裂 ; 详细翻译[1]
1、It avoids these problems of duplication and fission.
它能避免复制和分裂的问题么。
2、Some scientists in Denmark realized the military significance of this atomic fission or splitting of the atom.
丹麦的一些科学家，认识到了这种原子裂变或原子分裂的军事意义。
3、Of course, this artistic change made by corverted to religion is not a break or a fission, but a gradual change.
当然，这种由宗教皈依所带来的艺术变化，不是一种突变，也不是一种裂变，而是一种渐变。[1]