VOA慢速英语:Groups Oppose Social Media Password Collection at US Border

precedent – n. something that happens and can be used as an example or rule to be followed in the future

vet – v. investigate someone’s background thoroughly

mandatory – adj. required because of a law or rule

comply – v. do what you have been asked or ordered to do

monitor – v. watch something very carefully over time

warrant – n. document issued by a court that gives police the authority to do something