“petalichthyids”的概念、定义、翻译、参考文献-科学参考

单词	petalichthyids
释义	petalichthyids Encyclopedia 理学有颌类释 petalichthyids瓣甲鱼类盾皮鱼纲瓣甲鱼目动物的统称，是一种背腹扁平的盾皮鱼类，可能与节甲鱼类具有较近的亲缘关系。
随便看	elementary row operation elementary row transformation elementary sentence of locus elementary set elementary situation elementary solution elementary space elementary species elementary stage in fluid machinery design elementary state elementary strategy elementary subdivision elementary submodel elementary substance elementary substructure elementary subsystem elementary sum elementary surface elementary surgery elementary symmetric expression elementary symmetric function elementary symmetric functions elementary symmetric polynomial elementary syntax elementary system

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。