“费城黑人：一项社会研究”的概念、定义、翻译、参考文献-科学参考

单词	费城黑人：一项社会研究
释义	费城黑人：一项社会研究 Encyclopedia 工学〔工业革命～1945﹞释 The Philadelphia Negro: A Social Study《费城黑人：一项社会研究》研究美国黑人聚居区状况的社会学著作。美国社会学家W.E.B.杜波依斯（William Edward Burghardt Du Bois，1868～1963）撰写。
随便看	self-dual projective planes self dual space self-dual space self-dual system of axioms self dual vector space self-dual vector space self-duplicating self-education self-efficacy self electro optic effect self-electro-optic effect self electro-optic effect device self-embedding rule self-embedding theorem self-employed worker self-emulsifying drug delivery systems self energy self-energy self energy and self-energy correction self energy correction self-energy correction self energy of electrons self-enforcement mechanism self-enhancement self-equivalence

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。