研究society的方法究竟是study how people spend their leisure time 好还是 study how they at work好.
AA
说一个报纸说一个survey表明,南边的vulunteer ambulance team 比东边的commercial ambulance service的response time 慢,因此为了提高急救业务的revenue,应将南边的vulunteer 换成 commercial team. (其中说道,survey中的response time是各自上报的)