mass epidemic的用法和樣例：
例句
- The astronomical amount of death led to the declaration of a cholera epidemic in New York.
巨大的死亡人數導致紐約宣布霍亂大流行。 - Several epidemic influenza viruses leading to worldwide periodical pandemics all result from the genetic reassortment of different influenza viruses.
不同種屬流感病毒通過基因重排產生變異病毒導致了多次周期性全球流感大流行。
