VOA慢速英语:由于新冠病毒非洲的学校难以重开

access –n. a way of being able to get or use something

monitor –v. to watch or observe over a period of time in an effort to find something out

transmission –n. the process of something passing from person to person such as an infectious disease

asymptomatic –adj. having or showing no signs of disease while being infected

outbreak –n. the fast appearance and spread of a disease or of conflict