“The Great Migration of African Americans”的概念、定义、翻译、参考文献-科学参考

单词	The Great Migration of African Americans
释义	The Great Migration of African Americans Encyclopedia 历史学美国历史释 The Great Migration of African Americans黑人大迁徙 1916～1970年约600万非裔美国人从美国南部各州的乡村地区迁徙至东北部、中西部以及西部地区的大规模人口流动。又称北上大迁徙。
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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。