VOA慢速英语:Chinese Students Arrested for Cheating on TOEFL Exam

minimum - adj. the lowest number or amount that is possible or allowed — usually singular

calculate - v. to find (a number, answer, etc.) by using mathematical processes

defraud – v. to trick or cheat someone or something in order to get money : to use fraud in order to get money from a person, an organization, etc.

arise - v. to begin to occur or to exist​