“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	harmonic majorant function harmonic manifold harmonic map harmonic mapping harmonic mean harmonic mean index harmonic measure harmonic measurement harmonic minorant harmonic minorant function harmonic mixer harmonic modulation method harmonic morphism harmonic motion harmonic number harmonic operator harmonic oscillation harmonic oscillator harmonic-oscillator potential harmonic overtone harmonic pair harmonic parameter harmonic pencil harmonic pencil of lines harmonic pencil of planes

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。