VOA慢速英语:教师接触新冠患者仍可留在学校

infrastructure - n. the basic things that are needed for a country, area to function

quarantine - v. to keep a person away from others to prevent a disease from spreading

exposure - n. the condition of being affected by something

positive - adj. showing the presence of a particular germ

kindergarten - n. a school or class for very young children

contradict - v. to not agree with something

excuse - n. a reason that you give to explain a mistake or bad behavior

bully - v. to threaten or insult (smaller or weaker person)

essential - adj. extremely important and necessary