“投下”的概念、定义、翻译、参考文献-科学参考

单词	投下
释义	投下 Encyclopedia 历史学[政治制度]释 appanage投下又作头下、头项或投项，意为封地、采邑，语出辽代。
随便看	dumbbell radio galaxy dumbbell-shaped curve of zero velocity dumbbell-shaped radio galaxy Du Mingxin Dumitru Radu Popescu dumka dummy dummy antenna dummy bar dummy combination dummy dee dummy index dummy instruction dummy observation dummy order dummy piston dummy pressure closed coring dummy run dummy scale dummy subscript dummy teaser dummy variable dUMP dump dump and heap bioleaching

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。