“前第四纪”的概念、定义、翻译、参考文献-科学参考

单词	前第四纪
释义	前第四纪 Encyclopedia 理学前第四纪释 None前第四纪第四纪（其底界为258万年）以前的地质时期。
随便看	connected im Kleinen connected Lie group connected Lie subgroup connected loop connectedly connected manifold connected neighborhood connectedness connectedness between herds connectedness number connectedness of real numbers connected net connected network connected number connected pair of functors connected part connected path connected piece connected polyhedron connected product connected region connected relation connected ring connected scheme connected semigroup

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。