说明：  对多个城市的SARS疫情进行仿真，对出行的人数，感染概率，出行交通工具都可以进行设定，内附有详细的源码和设计说明书
(SARS epidemic on a number of cities simulation, the number of people on the trip, infection probability, travel transport can be configured, containing a detailed description of source and design)