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英语翻译Because manufacturing accounted for a relatively small f

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英语翻译
Because manufacturing accounted for a relatively small fraction of aggregate output in the nineteenth century United States,our results do not imply that the diffusion of steam dramatically altered the course of aggregate productivity growth.Nevertheless,they show that the di?usion of steam raised labor productivity in manufacturing and,if this di?usion had not occurred,the pace of industrialization would have been slower.Indeed,considering all of the specific technologies that diffused in manufacturing between 1850 and 1880,none may have had a bigger impact,in the sense of affecting more manufacturing workers,than the shift to steam power.
在十九世纪,制造业在美国总体生产中占的比例比较小,因此我们的结果并不表明蒸汽(机)的普及显著地改变了美国的总体生产值增长.虽然如此,它们却表明了蒸汽机的普及使得制造业领域的人均生产力提升了,如果蒸汽没有普及,那么美国工业化的脚步将会被延迟.的确,1850年到1880年之间,没有任何一样新科技能像蒸汽机那样显著地改变制造业工人的工作.