What this does is it increases the role of this commercial middle class.

这点就增强了中产阶级,在商业中发挥的作用

耶鲁公开课 - 欧洲文明课程节选

It increases the role of cities, particularly port cities, which Amsterdam is.

同时也增强了城市的作用,特别是海港城市,例如阿姆斯特丹

耶鲁公开课 - 欧洲文明课程节选