| 单词 | neutron |
| 释义 | Word Frequency neutron(ˈnjuːtrɒn) noun physics a neutral elementary particle with a rest mass of 1.674 92716 × 10–27 kilogram and spin1⁄2; classified as a baryon. In the nucleus of an atom it is stable, but when free it decays Word origin C20: from neutral, on the model of electron |
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