“古近纪煤系”的概念、定义、翻译、参考文献-科学参考

单词	古近纪煤系
释义	古近纪煤系 Encyclopedia 理学含煤地层释 paleogene coal measures古近纪煤系古近纪地层发育时期连续沉积形成的一套含有煤层并具有成因联系的沉积岩系。
随便看	principal bending moment principal block principal branch principal bronchus principal bundle principal bundle connection principal category principal cell principal character principal circle principal class principal coefficient of contraction principal cohomology class principal coincidence curve principal component principal component analysis principal component analysis and singular value decomposition principal component analysis (PCA) principal component analysis, PCA principal component analysis,PCA principal component clustering principal component discrimination principal component estimate principal component estimate of the coefficients in linear regression model principal component estimation

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。