pneumonic plague

例句：

1. 1.The pneumonic plague has killed thousands of people in the past few years.
   过去几年，鼠疫已经夺去数千人的生命。
2. 2. The outbreak of pneumonic plague is a major public health concern.
   鼠疫的爆发是一个重要的公共卫生问题。
3. 3.The pneumonic plague is caused by the bite of infected rats.
   鼠疫是由感染老鼠咬伤引起的。