VOA慢速英语:超级碗在疫情期间会有所不同

coach- n. a person who teaches and trains an athlete or performer

positive - n. showing the presence of a particular germ, condition, or substance

stadium - n. a very large usually roofless building that has a large open area surrounded by many rows of seats and that is used for sports events, concerts, etc.

mask - n. a covering for your face or for part of your face

breeding ground- n. a place or situation that helps or allows something to grow, develop, etc.

forefront- n. the most important part or position — usually singular

commercial- n. an advertisement on radio or television