在过去几年内，最严重的社会问题—从犯罪到青少年怀孕—都有所下降。
Over the past few years most social blights-from crime to teenage pregnancy-have declined.
相反，它只依靠参与阵势，甚至还大大动员公众评选当下最严重的社会问题。
Instead, it has relied on a participatory process, even inviting the public at large to weigh in on what issues are of most importance.
mashup开发人员需要面对的一个最严重的社会问题就是：在知识产权的保护和消费者的私密性与公用化以及信息的自由流动之间达成一种平衡。
One of the biggest social issues facing mashup developers is the tradeoff between the protection of intellectual property and consumer privacy versus fair-use and the free flow of information.
mashup开发人员需要面对的一个最严重的社会问题就是：在知识产权的保护和消费者的私密性与公用化以及信息的自由流动之间达成一种平衡。
One of the biggest social issues facing mashup developers is the tradeoff between the protection of intellectual property and consumer privacy versus fair-use and the free flow of information.
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