“脉羊齿类”的概念、定义、翻译、参考文献-科学参考

单词	脉羊齿类
释义	脉羊齿类 Encyclopedia 理学古植物学释 neuropterids脉羊齿类小羽片为脉羊齿型的种子蕨类植物的集合。小羽片基部收缩成心形，以一点或部分附着于轴上，中脉至小羽片上部消散，侧脉羽状或简单网状。
随便看	descending chain condition descending chain condition for left ideals descending colon descending development method descending difference descending factorial descending ideal series descending induction descending inhibition descending node descending normal series descending order descending order of powers descending pathways descending perineum syndrome descending plane partition descending powers descending power series descending sequence descending series descensional ventilation descent descent algorithm descent datum descent direction

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。