“The Philadelphia Negro: A Social Study”的概念、定义、翻译、参考文献-科学参考

单词	The Philadelphia Negro: A Social Study
释义	The Philadelphia Negro: A Social Study 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	two-photon detuning two-photon emission two-photon excitation microscopy two photon excited atomic fluorescence two-photon excited atomic fluorescence two-photon fluorescence two photon fluorescence microscope two-photon fluorescence microscope two-photon fluorescent probe two-photon Hong-Ou-Mandel interferometer two-photon interference two photon laser two-photon laser two-photon microscopic imaging two-photon polymerization laser direct writing two-photon process two photon resonance two-photon resonance two photon Young's double slit interference two-photon Young's double slit interference two pixie stone guardians of Zong Zi’s tomb two-place two-place number two-place operation two-place predicate

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。