But they do not stop spontaneous fissions in fuel rods from fuel and fission products.

但他们并没有阻止自然地发生在来自核燃料和裂变产物的燃料棒上的裂变。

The free neutrons can bombard other nuclei, leading to a series of fissions a chain reaction.

自由中子可以轰击其它的核, 导致一系列的裂变,称为链锁反应.

A series of nuclear fissions in which neutrons released by splitting one atom leads to the splitting of others.

一个原子分裂后释放的中子引起其他原子分裂的一系列核裂变过程。