“章动常数”的概念、定义、翻译、参考文献-科学参考

单词	章动常数
释义	章动常数 Encyclopedia 理学天文常数系统释 nutation constant章动常数真天极绕平天极在大约18.6年内描绘出一个椭圆，称为章动椭圆，其半长轴的大小称为章动常数。它是天文常数之一。 Astronomy nutation constant; nutational constant; constant of nutation章动常数
随便看	substance is subject substance, matter substance metabolism test substance-related disorders substandard substandard drugs substandard propagation substandard refraction substantial acceleration substantial constant substantial convergence substantial definition substantial equivalence principle substantial immersion substantial theory in psychology substantial variation substantia nigra substantiation substantive definition and functional definition of religion substantive derivative substantive legal reasoning substantive office substantive rule of law substantive significance substantive value ethics

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。