原子本身是个整体，含电子、质子、中子以及其他组成部分。

An atom itself is a complete whole, with its electrons, protons and neutrons and other elements.

《柯林斯英汉双解大词典》

在一个原子的核内，中子和质子聚合在一起。

Neutrons and protons are bound together in the nucleus of an atom.

《柯林斯英汉双解大词典》

重水之所以重是因为水中氢的重量是普通氢的两倍（它的原子核中有一个质子和一个中子，而不仅仅是一个质子）。

Heavy water is heavy because the hydrogen in it weighs twice as much as ordinary hydrogen (it has a proton and a neutron in its nucleus, instead of just a proton).

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And it is equal to the sum of the number of protons plus the number of neutrons.

它等于质子数,加上中子数。

麻省理工公开课 - 固态化学导论课程节选

And carbon 14, 6 again and it has 8, and it is found in vanishingly small amounts, 10 10 to the minus 12 or part per trillion.

碳14，6个质子，8个中子，它的存在是非常微小的，几乎趋于零，万亿分之。

麻省理工公开课 - 固态化学导论课程节选

Nowadays we know if you go into the neutron or the proton, there are quarks.

如今我们知道,如果进入中子或者质子内部,就会发现夸克

耶鲁公开课 - 基础物理课程节选