“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	photometric orbit photometric paradox photometric parallax photometric period photometric phase photometric precision photometric redshift photometric scale photometric sequence photometric solution photometric standard photometric standard star photometric system photometric telescope photometric titration photometric wedge Photometry photometry photometry metrology photomicrograph photomicrography photomicrometer photomicroscope photomicroscopy photomixer

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。