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2009年2月17日在美国,人们看了50多年的电视广播即将被数字广播电视所取代。尽管美国的电视网络将转向更先进的技术,但模拟向数字技术的切换会给仍在
February 17, 2009 In the United States, television broadcasts that have been watched for more than 50 years are about to be replaced by digital radio and television. Although the U.S. television network will move to more advanced technologies, the switch to analogue digital technology will still be