VOA慢速英语:美国父母在疫情期间增加了线上学习的兴趣

mask – n. a protective covering for the face to designed prevent passage of infection from one person to another

application – n. a document that is used to make a formal request for something

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

district – n. an area established by a government for official government business

confusion – n. a situation in which people are unsure about what to do or are unable to understand something clearly

transition – n. a change from one state or condition to another

monotonous – adj. used to describe something that is uninteresting because it is always the same