“black Americans”的概念、定义、翻译、参考文献-科学参考

单词	black Americans
释义	black Americans Encyclopedia 法学〔北美各民族〕释 black Americans美国黑人历史上被欧洲殖民者劫运到美利坚合众国的非洲黑人奴隶的后裔。又称非洲裔美国人。
随便看	primary decomposition theorem primary defects primary deposits primary development of land primary difference primary distance indicator primary divisor primary document primary domain of integrity primary eclipse primary egg envelope primary electron primary element primary endosperm cell primary endosperm nucleus primary energy primary environment primary environment; original environment primary etching primary explosive primary extension primary extraction primary factor primary feed primaryfermentation

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。