spontaneous fission

例句：

1. 1.The spontaneous fission of the cell led to the formation of a new organism.
   细胞的自发分裂导致了新生物的形成。
2. 2. The spontaneous fission of the cell led to the formation of a new organism.
   细胞的自发分裂导致了新生物的形成。
3. 3. The spontaneous fission of the cell led to the formation of a new organism.
   细胞的自发分裂导致了新生物的形成。