But while the total binding energy still increases for nuclei larger than iron, the binding energy per nucleon, in fact, decreases.

但是，虽然对于比铁大的原子核，总结合能仍然增加，但实际上每个核子的结合能却降低了。

The amount of energy required to break up a nucleus into its component particles gets larger as the atomic number increases, with iron having one of the highest binding energies per nucleon.

随着原子序数的增加，将原子核分解成其组成粒子所需的能量会变大，铁是每个核子结合能最高的物质之一。