“古羊齿目”的概念、定义、翻译、参考文献-科学参考

单词	古羊齿目
释义	古羊齿目 Encyclopedia 理学古植物学释 None古羊齿目前裸子植物的一目。晚泥盆世森林中真正的木本树蕨，高达10～30米，直径1.6米左右。北半球常见。
随便看	effective discharge effective distance effective divisor effective domain effective dose effective elastic thickness effective enumeration effective equivalent dose effective equivalent dose rate effective error mean square effective field effective field theory effective filter response effective filtration pressure effective flow resistance effective f-number effective focal length effective focal spot effective focus length effective formal deformation Effective Formulae Handed Down for Generations effective frequency range effective fuel consumption effective functional effective genus

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。