Immanuel Wallerstein is a senior research scholar at Yale University.

沃勒斯坦是耶鲁大学的资深研究学者。

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Dr. GARY SICK (Senior Research Scholar and Adjunct Professor of International Affairs, Columbia University): All we ever talk about is adding more sanctions until Iran finally gives up, and I don't know of anybody in the European side or the American side, who genuinely believes that another round of sanctions, which is likely to be pretty mild, is going to make Iran really change its policies.

NPR: U.S. Intelligence Report Complicates Iran Debate