US Vice-president Joe Biden praised Mr Obama's swift work since coming to office in January. 美国副总统拜登赞扬奥巴马总统从一月份上任以来的快速有效的工作。
The American vice-president, Joe Biden, visited Ukraine and Georgia, reassuring both countries that America would support them even as it sought better relations with Russia. 美国副总统拜登访问了乌克兰和格鲁吉亚，重申美国将会支持两国，尽管美国与俄罗斯的关系还有待修补。
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