It gathered pace after the failures of Fannie Mae and Freddie Mac, two government-sponsored enterprises that provide cheap home loans.

在提供低利率房贷的美国两大国有企业房利美(FannieMae)和房地美(Freddie Mac)破产后，违约加速。

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However due to the institutional failures, which include market failure and government failure, current socioeconomic system is inefficient in allocating urban environmental resources.

由于相关制度安排的缺陷，现存社会经济体系对城市环境资源的配置出现了低效率，城市环境问题随之产生。

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However due to the institutional failures, which include market failure and government failure, current socioeconomic system is inefficient in allocating urban environmental resources.

由于相关制度安排的缺陷，现存社会经济体系对城市环境资源的配置出现了低效率，城市环境问题随之产生。

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