VOA慢速英语:伊朗违反核协议承诺 欧洲感到压力

sanction –n. measure put in place to cause a country to obey international law, usually by limiting or banning trade

breach –v. a failure to do what is required by a law or agreement

barter –v. to exchange goods for other goods rather than money

volumes –n. amounts

brinksmanship –n. the method of permitting a situation to become extremely dangerous in order to get a desired result