在美国，监管人可能需要确定商业价值的时长是多少：也许地震相关新闻有两个小时，体育比赛的结果有30分钟。
In America, a regulator would presumablyneed to determine the period of commercial value: perhaps two hours for news ofan earthquake, 30 minutes for sports results.
Mann从来没有一部电影是简短的，他常常能拍出延展很好的时长在两个小时以上的电影。
Mann has never been one for brevity, regularly churning out films that extend well beyond two hours in length.
Mann从来没有一部电影是简短的，他常常能拍出延展很好的时长在两个小时以上的电影。
Mann has never been one for brevity, regularly churning out films that extend well beyond two hours in length.
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