求翻译：回顾以往的发展，上海经济格局也进入了瓶颈时期，必须寻求新的突破。一是以投资和政府推动型的经济发展已到转型之时，城市基础设施建设的高峰已过。二是以大型项目建设拉动发展的模式不具有持续性。三是土地、环境等公共资源日趋枯竭，城市生活和生产成本居高不下迫使经济结构做出调整。因此，经济转型势在必行。而房地产不仅是第三产业的重要支柱，也是占有GDP重大比重的对国民经济有支柱作用的产业，而且有日益膨胀的趋势。在经济转型的大背景下，房地产行业必受牵连。是什么意思？

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The review former development, the Shanghai economical pattern also entered the bottleneck time, must seek the new breakthrough.One, invests and the government impels the economical development already to reforming when, the city infrastructure construction peak crossed.Two, does not have the endura

Review of past development, Shanghai's economy has entered a bottleneck, must seek new breakthroughs. Is as an investment and the Government to promote economic development to the time of transition, urban infrastructure construction has passed its peak. Second, to pull the model for the development