“黑人大迁徙”的概念、定义、翻译、参考文献-科学参考

单词	黑人大迁徙
释义	黑人大迁徙 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。
随便看	Field rule Fields field safety management Fields and Waves in Communication Electronics field search field seepage test field sensible heat exchange field setup definition field shelter hospital system field site of soil and water conservation monitoring Fields Medal Fields medal field soil heat exchange field soil moisture forecast field soil water balance field source field source correction field sowthistle field spectroradiometer field star field static correction field statistic field stop field stop insulated gate bipolar transistor field stop, view stop

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。