VOA慢速英语:美国要求入境旅客提供新冠病毒检测证明

negative - adj. not showing the presence of a particular germ, condition, or substance

eliminate - v. to remove (something that is not wanted or needed) : to get rid of (something)

destination - n. a place to which a person is going or something is being sent

global - adj. involving the entire world

encourage - v. to tell or advise (someone) to do something

authorities - n. people who have power to make decisions and enforce rules and laws

domestically - adv. of, relating to, or made in your own country