The reason, of course, is the “Parameters for a Joint Comprehensive Plan of Action Regarding the Islamic Republic of Iran’s Nuclear Program,” the framework just adopted by Iran and the P5+1 (the UN Security Council’s five permanent members – China, Britain, France, Russia, and the United States – plus Germany). The agreement constitutes an important political and diplomatic milestone, and it contains more detail and is broader in scope than many anticipated.
原因当然是“关于伊朗核计划的全面协议条件”（Parameters for a Joint Comprehensive Plan of Action Regarding the Islamic Republic of Iran’s Nuclear Program），即刚刚由伊朗和P5+1（中国、英国、法国、俄罗斯和美国等联合国五大常任理事国加上德国）达成的框架。该协议构成了重要的政治和外交里程碑，其所包含的细节和范围比许多人所预测的更多更广。