"There was a great deal of careful data collected showing how identical the two sections, these two large sections of the class were beforehand.

VOA: special.2011.06.02

Northern Italy has a large percentage of the population who are middle class.

意大利北部有很大比例的中产阶级

耶鲁公开课 - 欧洲文明课程节选

Northern Italy has a large percentage of the population who are middle class.

意大利北部有很大比例的中产阶级

耶鲁公开课 - 欧洲文明课程节选