VOA慢速英语:经济学家:四年内完成学业是成功的关键

graduate – v. to receive recognition from a school for completing a study program

degree – n. an award or honor from a college, university or other school

guy – n. a man or person

athletic – adj. of or related to a sporting event

probation - n. a situation in which students with low grades are told they will have to do better to stay in school

persist - v. to keep trying -- even after setbacks -- to get something done

obligation - n. a responsibility to do something

assignment – n. a duty