See elementary particles.
An intended or natural model of a theory. A non-standard model of a mathematical theory is one which is not isomorphic with the intended or natural model (See Skolem paradox).
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。