VOA慢速英语:非洲村庄成为内陆海洋

cyclone – n. an extremely large, powerful storm with high winds

toll – n. the number of deaths or injuries resulting from an event, such as a natural disaster or war

subside – v. to go down to a lower level

drain – v. to flow into, away from, or out of something

district – n. a part of a city or country