“Free and Imperial Cities”的概念、定义、翻译、参考文献-科学参考

单词	Free and Imperial Cities
释义	Free and Imperial Cities Encyclopedia 历史学德意志历史释 Free and Imperial Cities帝国自由市神圣罗马帝国时期直属于皇帝（亦即德意志国王）的城市和市镇，根源于皇帝领地。
随便看	cyclic neutron activation analysis cyclic nucleotide phospodiesterase cyclic number cyclic operator cyclic order cyclic part cyclic path cyclic pentagon cyclic peptide cyclic peptide; cyclopeptide cyclic period cyclic permutation cyclic permutation group cyclic photophosphorylation cyclic plane cyclic point cyclic polygon cyclic polymer cyclic polynomial cyclic polytope cyclic process cyclic processes cyclic product cyclic projection method cyclic projective plane

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。