密西根大学曾做过一次研究，其中一组志愿者的任务是漫步公园，另一组则是行走城市街道。
In a particular study by the University of Michigan, one group of volunteers took a walk in the park, while another group navigated the busy city streets.
选择这个地方显得是因为他狭窄的街道，破旧的基础设施和多样的人口组成——包括老龄化的移民，各种生意的老板，大学生和其他的年轻人。
It was apparently chosen for its narrow streets, older infrastructure and diverse demographics, including aging migrants, owners of assorted businesses, university students and other young people.
吸烟者随处可见：在街道上，在大学校园里，在商店。
We meet smokers everywhere: in the streets, on college campuses and in shops.
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