Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
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
