VOA慢速英语:Iran Nuclear Talks May Push Beyond Time Limit

framework – n. an agreement on the structure of a deal, but not its details and how it will be carried out

sanction(s) – n. actions that are taken to make a country obey international law by limiting trade with that country

verify – v. to prove, to find out if something is true, correct or as it should be

concession(s) – n. things given up in order to get something that is desired such as an outcome

gradual – adj. something that comes into being slowly over time