A useful model explaining this particular pattern of urban activity can be developed from ceiling-rent curves.

模式 的一种有效的模型可以从最高限度租金曲线显示出来。

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Local Urban Activity Corridors: An Effective Approach towards the RealIntegration of Land-use Planning and Transport Planning?

地方城市活动走廊：一种真正整合土地使用和交通规划的有效方法?。

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They provide new opportunities for planning, controlling and coordinating urban activity and new concerns about privacy and security. We'll look at the technology and discuss some of the implications.

他们也提供规划、控制和协调都市活动的新机会，并且私隐与安全的新关注，我们将会观察科技的进展和讨论一些应用。

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The site illustrates the evolution of pastoral, agricultural and urban activity in the region.

UNESCO: Office in Amman

Chicago schools suffer, in heavy doses, all the ills of urban school districts: poverty, gang activity and teen pregnancies.

FORBES: Chain Saw Paul

The conference is focused on, among other things, the resurgence of technology and entrepreneurial activity in Detroit and other urban areas in the Midwest and elsewhere.

FORBES: Steve Case Live From Detroit: Pushing Entrepreneurship