美国国务卿就美国发现艾滋病30周年的声明 Statement on Secretary Clinton on 30th Anniversary of HIV/AIDS in United States June 5, 2011 美国国务卿克林顿就美国发现艾滋病30周年的声明 2011年6月5日 As we commemorate the 30th Anniversary of the first
Well let me give you an example. 让我来给你们一个例子。 Imagine for a moment that, instead of Tim Harford in front of you, there was Hans Rosling presenting his graphs. 你们想象一下，现在如果站在你们面前的不是我，而是汉斯·罗斯林在展示他的图表。 You
