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- A proton or a neutron, especially as part of an atomic nucleus. 核子质子或中心，尤指作为原子核的一个组成部分
- Proton and neutron form a charge doublet. 质子和中子构成电荷双重态。
- We think of a nucleus as made up of neutron and proton. 我们认为原子核是由中子和质子构成的。
- The nucleus of an atom consists of neutrons protons and other particles. 原子核由中子、质子和其他粒子构成。
- We think of a nucleus as make up of neutron and proton. 我们认为原子核是由中子和质子构成的。
- We think of a nucleus as made up of neutron and proton . 我们认为原子核是由中子和质子构成的。
- I suppose you also have a caste system in your society. 我想你们的社会里也有一种等级制度。
- A proton or a neutron has about the same mass as a hydrogen atom. 质子或中子的质量和氢原子的质量大致相同。
- The right to dissent is part of our political system. 有持异议的权利是我们政治体制的组成部分。
- Do you know how to log in to the system? 你知道怎么登录进入这个系统吗？
- Neutron has a mass slightly larger than that of proton. 中子的质量略。
- Public opinion was against the old feudal system. 公众舆论反对旧的封建制度。
- The system works on the principle that heat rises. 该项装置是按照热力上升的原理运转的。
- Neutron is neutral and slightly heavier than the proton. 中子是中性的，比质子略重。
- The drainage system has been aged. 排水系统已经老化了。
- The weight of a neutron is about the same as a proton. 中子的重量和质子的重量差不多相等。
- They called for a radical reform of our tax system. 他们要求对税收制度进行根本改革。
- This is a highly efficient new heating system. 这是个高效的新取暖系统。
- He's mute on the subject of social system. 他对社会制度的问题保持沉默。
- An isotope of hydrogen with one proton and one neutron in the nucleus having an atomic weight of2.014. 氘氢的一种同位素，在其原子核内有一个质子和一个中子，其原子重量为2。014
