VOA慢速英语:新冠病毒导致美国4月份失业率创历史新高

pandemic – n. when a disease affects a large area and affects a large number of people

emerge – v. to become known; to rise from; to come into being

survey – n. questioning a group of people to gather information or their opinions

sector – n. an economic or political subdivision of a society or country

lockdown – n. an emergency measure in which people are temporarily prevented from entering or leaving a restricted area because of a danger or health threat