protons

We cannot do anything about protons, they are buried in the nucleus, but we can add or subtract electrons.

我们不能改变质子，它们埋藏在原子核内，但是我们能够增加或减少电子。

He agreed that the holes could not have anything to do with protons, so there had to be some mysterious reason why they did not occur in nature.

他同意空穴与质子没有任何关系的观点，所以在它们为何没有出现在自然界这一点的背后必然隐藏着某些神秘的原因。

Quarks are the constituents of protons and neutrons, as well as more exotic things.

夸克是质子和中子的组成粒子，也是更为奇异的物质。