首先我想介绍美国社会学家马克·格兰诺维特在1973年的研究。
I'd like to start by mentioning the research of American sociologist Mark Granovetter in 1973.
里普利引用了著名社会学家詹姆斯·科尔曼的著作，科尔曼在教育方面的研究是开创性的。
Ripley cites the writings of renowned sociologist, James Coleman, whose research in education was groundbreaking.
两位社会学家理查德·阿鲁姆和约西帕·罗卡萨的研究明确说明了这一点。
This was made clear by the work of two sociologists, Richard Arum and Josipa Roksa.
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