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.
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。
2
Dr Scott, assistant professor of management at Michigan State University, analysed a group of bus drivers during a two-week period.
斯科特博士是密歇根州立大学的管理学助理教授，他分析了一组公交司机在两周内的表现。
3
The manhunt for the gunman who opened fire on a group of swimmers at the Wisconsin-Michigan border has ended with the arrest of a suspect.