The agreement is the first postwar treaty to reduce non-nuclear weapons in Europe.该协议是战后欧洲削减非核武器的第一个条约。Iran reached a non-nuclear agreement with the world powers and promised that it would reduce the number of centrifuges by two thirds.伊朗与列强达成的禁核协议保证它将会把分离机的数目削减三分之二。