In this paper, according to the principle of fuzzy synthetic evaluation method, first, the technical and economic indexes which influence the optimum selection of machinery are analyzed.
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在对一系列经济指标进行了颇为精确的分析之后,美国国家经济研究局正式宣布了经济衰退的到来。
America's National Bureau of economic Research has officially declared a recession based on a more rigorous analysis of a range of economic indicators.