但因研究对象范围小以及研究对象的局限性，在有其他研究者进行此研究前，对此研究结果应持谨慎态度。
However, given the small sample size and limited nature of the population studied, naturally these results should be taken with a grain of salt until replicated by other researchers.
目前进行的很多词义消歧研究多采用凡个多义词作为试验测试对象，在实际应用方面存在着局限性。
Only some ambiguous words are disambiguated objects in many word sense disambiguation researches at present. There practices have limitation in real application.
在此背景下，本文以经济学效用概念的演化为主线展开研究，深入探讨经济人假设的合理性、局限性以及经济学的研究对象和研究方向。
Under the background, we focus on the deduction of the concept "utility" in economics and analyze the rationality and limitation of "economical man" and the research object and direction of economics.
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