US President Obama says US intelligence estimates show Iran is a year or more away from building a nuclear weapon. ________________________President Obama also said the world must test whether Iran's President Hassan Rouhani is serious about resolving its nuclear dispute diplomatically. 奥巴马总统称美国情报机构的预测显示,伊朗只需一年或一年多的时间就可造出核武器._______________________奥巴马总统也称,世界各国必须检验伊朗总统哈桑?鲁哈尼是否真正地想以外交途径解决核武纷争.