“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	system temperature system testing system test mode system theory system theory of policy implementation system theory school system thinking method system thrashing system time synchronization system upgrade system utility program system view system-wide information management system with adaptation system with a queue system with complete connections system with constant coefficients system with convergence system with exterior multiplication system with randomness system with time lags system with waiting system Ⅰ longitude system Ⅱ longitude system Ⅲ longitude

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。