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(guò)基因重排產(chǎn)生變異病毒導致了多次周期性全球流感大流行。
