They take up a teeny bit, but when we're thinking about the set up of the atom, we don't have to account for them as using up a lot of the mass.
它们占据了非常小的一部分，但当我们考虑原子的构造的时候，不用考虑它们会占用很多的质量。
2
European scientists say they have set a record for high-energy collisions of protons in the world's largest atom smasher, mimicking conditions close to the "Big Bang" that created the universe.