If one day, a person sick with the measles appears in this city the disease won't find much resistance and will begin spreading from person to person, and in no time it will disseminate throughout the community.
如果有一天，一个麻疹患者来到这个城市 这个疾病将不会受到任何阻碍 并在人们之间开始传播 然后很快它就会传遍整个社区