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2007年1月中下旬,美国各大电视台陆续播放着这样一则广告:“给1亿个AT&T用户打电话吧——免费!”这则广告源于美国最大的通信运
In mid-to-late January 2007, major U.S. television stations broadcast such an advertisement one after another: “Call 100 Million AT & T Users - Free!” This advertisement originated from America’s largest communications carrier