谋杀率下降了百分之四十多，并且保持下降态势。

The murder rate fell by more than 40%, and has stayed down.

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而与之相反的是，美国人口普查署的报告称，按2008 年年收入5.8万美元的标准计，华盛顿中等家庭收入呈稳步增长态势。

In contrast, the Census Bureau has reported a steady increase in median household income in the District, estimated at $58, 000 in 2008.

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法定义务之根本违约的实证分析表明了根本违约出现了向前、向后扩张的态势。

Fundamental breach of statutory obligations empirical analysis shows that there has been a trend of fundamental breach of contract forward, backward expansion.

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