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1·In recent years, underground economy has become a burning field of research all over the world.

最近二三十年，地下经济问题逐渐成为国内外学术界的一个研究热点。

2·Analysis in reality is on tax reason and non-tax reason why underground economy exists in our country.

现实分析主要从我国地下经济产生的非税收原因和税收原因两个方面进行分析。

3·Because at that time, the underground economy had not displayed the inflation tendency, the research scope was quite limited.

但由于当时地下经济并没有表现出膨胀的趋势，所以研究的范围还是比较有限的。

4·This thesis is basically concerned with Underground Economy, an area that remains to be fully understood but has attached increasing attention.

本文研究一个还没有被充分认识但日益受到人们关注的经济活动领域——地下经济。

5·All bloggers know that the way to get links is to engage in the secret underground economy of sucking up to bloggers with higher Technorati rank than you.

所有博客作者都知道，得到链接的方法是参与到吸收拥有比自己更高的Technorati排名的博客作者的神秘地下系统中。

6·Until Second World War period, some scholars only started to these economic phenomena to conduct the research, contained the underground economy research.

直到第二次世界大战期间，一些学者才开始对这些经济现象进行研究，其中也包含了对地下经济的研究。

7·Because of the transaction costs, while engaging in economic activities people are faced with two alternatives: underground economy or overground economy.

由于交易成本的存在，使人们在进行经济活动时，面临着地上经济还是地下经济的选择。

8·Contrasted with the underground economy, recessive industry is a special industry characterized by its relativity, extensiveness, scale, and transitivity.

隐性产业是一种特殊的产业形态，它与地下经济有着明显的界分，存在着相对性、外生性、规模性、过渡性等特征。

9·Speaking in Texas close to the border with Mexico, Mr Obama said bringing illegal immigrants out of the underground economy would be good for the country as a whole.

在得克萨斯与墨西哥边境处发表讲话时，奥巴马称，总体来说，将非法移民从地下经济中挽救出来对美国来说是好事。

10·Meanwhile, this study also tentatively discussed some positive influences, and this can help us understanding the characters of underground economy more deeply.

与此同时，本文也就地下经济的部分有益影响进行了初步探索，这一认识有助于更全面的理解地下经济的性质。