“真兽类”的概念、定义、翻译、参考文献-科学参考

单词	真兽类
释义	真兽类 Encyclopedia 理学哺乳纲（化石）释 eutherians真兽类哺乳纲中兽类的一大分支，包括有胎盘类动物（placentals），以及在系统演化树上与有胎盘类的亲缘关系比与有袋类（marsupials）的亲缘关系更近的所有动物。
随便看	second boundary value problem second Brillouin zone second Brocard Cevian triangle second Brocard circle second Brocard point second Brocard triangle Second Bulgarian Kingdom second category second category set second cementing interface second characteristic polynomial second class of ordinal numbers second comparison test second complementary law second component second conjugate space second contact second control second cosine formula second cosine theorem second cosmic velocity second countability axiom second countable space second countable topological space second Cousin problem

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。