短语词组短語case -fatality 病死率a case -fatality rate 病死率hospitalization case -fatality rate 住院病死率-day case -fatality rate 天病死率30 -day case-fatality rate 天病死率case fatality rate detail 疾病死亡率case fatality rate 病死率;致死率;病故率 返回 case fatality