In fact, nothing expresses that assumption more clearly than three simple numbers: 9-1-1, which, of course, is the number for the emergency police operator here in Canada and in the United States, where the average response time to a police 911 emergency call is about 10 minutes.
事实上，给我们吃定心丸的 就是那三个数字： 911， 不用说，这就是加拿大和美国 通用的紧急报警号码， 拨打911的警方平均响应时间 大概是10分钟。