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2013-05-23 12:21
求翻译：The two economists published another study in nineteen eighty-two. They developed ways to explain business cycles, times of increase or decrease in economic activity. They showed how new technology creates periods of economic growth and productivity.是什么意思？ 待解决
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The two economists published another study in nineteen eighty-two. They developed ways to explain business cycles, times of increase or decrease in economic activity. They showed how new technology creates periods of economic growth and productivity.
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