“奥陶纪”的概念、定义、翻译、参考文献-科学参考

单词	奥陶纪
释义	奥陶纪 Encyclopedia 理学古生代释 Ordovician Period奥陶纪古生代第二个纪，约开始于4.85亿年前，结束于4.44亿年前。 Biology Ordovician奥陶纪
随便看	primitive recursive isomorphism primitive recursiveness primitive recursive operation primitive recursive predicate primitive recursive relation primitive recursive scheme primitive recursive set primitive recursive transformation primitive reflex primitive regular group primitive relation primitive religion primitive representation primitive representation space primitive right triangle primitive ring primitive root primitive root of unity primitive sculptures of China primitive semigroup primitive semiperfect number primitive sentence primitive septum transversum primitive sequence primitive set

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。