英语释义
1. an elementary particle that is identical with the nucleus of the hydrogen atom, that along with the neutron is a constituent of all other atomic nuclei, that carries a positive charge numerically equal to the charge of an electron, and that has a mass of 1.673 × 10?27 kilogram
2. a very small particle of matter that is part of the nucleus of an atom and that has a positive electrical charge
3. a very small particle that exists in the nucleus of every atom and has a positive charge of electricity
4. an elementary particle that is identical with the nucleus of the hydrogen atom, that along with neutrons is a constituent of all other atomic nuclei, that carries a positive charge numerically equal to the charge of an electron, and that has a mass of 1.673×10?24 gram