季度的

The following factors, among others, could cause actual results and future events to differ materially from those set forth or contemplated in the forward-looking statements: defaults on or non-renewal of leases by tenants or renewal at lower-than-expected rent or failure to lease at all or on favorable terms, decreases in real estate values and impairment losses, increased interest rates and operating costs or greater-than-expected capital expenditures, our failure to obtain, renew or extend necessary financing, re-financing risks, risks related to our obligations in the event of certain defaults under co-investment ventures and other debt, risks related to debt and equity security financings, difficulties in identifying properties to acquire and in effecting acquisitions, our failure to successfully integrate acquired properties and operations, our failure to divest properties we have contracted to sell or to timely reinvest proceeds from any divestitures, our failure to contribute properties to our co-investment ventures, risks and uncertainties affecting property development, value-added conversions, redevelopment and construction (including construction delays, cost overruns, our inability to obtain necessary permits and public opposition to these activities), our failure to qualify and maintain our status as a real estate investment trust, risks related to our tax structuring, failure to maintain our current credit agency ratings or to comply with our debt covenants, environmental uncertainties, risks related to natural disasters, financial market fluctuations, changes in general economic conditions, global trade or in the real estate sector, inflation risks, changes in real estate and zoning laws, a continued or prolonged downturn in the U.S., California or global economy, risks related to doing business internationally and global expansion, risks of opening offices globally, risks of changing personnel and roles, losses in excess of our insurance coverage, unknown liabilities acquired in connection with acquired properties or otherwise and increases in real property tax rates.

以下因素可能会导致实际结果和未来事件与前瞻性陈述产生重大出入：承租人拖欠租金或者不续租；利率以及经营成本的提高；我们未能获得必要的外部融资；再融资的风险；与合资项目和其它债务发生特定违约时我方承担的义务有关的风险；与债务和股权融资有关的风险；确定拟收购的物业以及完成收购过程中遇到的困难；我们未能成功整合收购的物业和业务；我们未能剥离已经签约出售的物业或未能及时将剥离带来的收益再投资；影响物业开发和建设的风险和不确定性（包括建设延期、费用超支、我们无法获得项目建设所需的必要批准以及公众对项目开发建设的反对等）；我们无法获得或者维持作为房地产投资信托公司的资质；与我们的税收策划有关的风险；无法保持我们目前的信用评级；环保方面的不确定性；与自然灾害有关的风险；金融市场的波动；整体经济状况或者房地产业的变化；房地产和城市规划法律的调整；美国、加利福尼亚州或者全球经济的衰退；与开展国际业务和全球扩张有关的风险；保险范围之外的损失；与被收购的物业有关的或者其它未知责任以及房地产税率的提高等。我们的成功还依赖于总体经济走向，包括利率、所得税法、政府监管、立法、人口总数变化以及我们在10-K表中作的截至2009年12月31日的季度报告中&风险因素&和其它标题项下阐述的其它问题。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。