“热河鸟”的概念、定义、翻译、参考文献-科学参考

单词	热河鸟
释义	热河鸟 Encyclopedia 理学鸟纲（化石）释 None热河鸟除始祖鸟外最原始的已灭绝的鸟类。热河鸟目热河鸟科中的一属。
随便看	closed convex hull closed convex hypersurface closed convex set closed convex surface closed covering closed current closed curve closed-curve problem closed cycle closed cycle engine closed-cycle refrigerator closed differential closed differential field closed differential form closed differential relation closed disk closed domain closed drain system closed-easy-axis closed economy closed ecosystem closed edge sequence closed edge train closed elastic drive closed element

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。