VOA慢速英语:龙卷风预测能力增强 但伤亡仍旧发生

technically – adv. according to a very strict explanation of a rule or fact

meteorology – n. a science that deals with the atmosphere and with weather

county – n. an area of a state or country that is larger than a city and has its own government to deal with local matters

instability – n. the state of being likely to change

region – n. a part of a country or of the world that is different or separate from other parts in some way

mobile home(s) – n. a house that is built in a factory and then moved to the place where people will live in it

vulnerable – adj. easily hurt or harmed physically, mentally, or emotionally