“Slavery in the United States”的概念、定义、翻译、参考文献-科学参考

单词	Slavery in the United States
释义	Slavery in the United States Encyclopedia 历史学美国历史释 Slavery in the United States美国奴隶制在美国历史上长期持续的人身奴役制度，受奴役的对象主要来自非洲的强制移民及其后代。
随便看	convergescence converging converging angle converging beam converging diffuser converging-diverging nozzle converging lens converging light converging magnetic mirror converging mirror converging nozzle convering belt conversation agent conversational implicature conversational language conversation analysis Conversations of a Guest in a Thatched Pavilion converse converse automorphism converse digraph converse domain converse graph converse implication converse law of contraposition converse-negative proposition

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。