VOA慢速英语:美国大学对新冠病毒测试有着多种计划

campus – n. the area and buildings around a university, college, or school

positive – adj. showing the presence of a particular germ, condition, or substance

overload – v. to cause something to be used for too many things at the same time

jam up – p.v. to cause something to stop working correctly

comfort – n. a state or feeling of being less worried, upset, or frightened during a time of trouble or emotional pain

symptom(s) – n. a change in the body or mind which indicates that a disease is present

random – adj. chosen or done without a particular plan or pattern

sample(s) – n. a small amount of something that gives you information about the thing it was taken from

transmission – n. the act or process by which something is spread or passed from one person or thing to another