“System of four ethnic classes”的概念、定义、翻译、参考文献-科学参考

单词	System of four ethnic classes
释义	System of four ethnic classes Encyclopedia 历史学[政治制度]释 System of four ethnic classes四等人制中国元朝的民族等级制度。
随便看	mud rheology mud scratcher mudsnail mudstone and shale density method mudstone densitometry method mudstone density measurement mud to cement Mudu Ancient City Site Mudu Zhen mud volcano of the sea bottom mud wasp with snout moth's larva mud weight Mueller matrix Mu Enzhi muetiobjective interactive MUF Mufarrihul kulub muff muffin-tin approximation muffin-tin potential muffle muffle furnace muffler muffler performance Mufrid

科学参考收录了854744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。