“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	backstepping control backstepping design backstop backstrap treadle loom Back Street backstroke backstroke of Summer Paralympics backstroke of Summer Special Olympics back substitution back-substitution back-substitution process back surface backswept back-testing backthrust back titration Back to 1942 back to back Back to Back, Face to Face Back to Country Life Back to Methuselah Back to Spring Back to The Future Back to the Origin of Poetry backtracking

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。