翻译内容：
　　iPhone squeezes phone carriers' margins 　　
　　NEW YORK (Reuters) - Profits at the three largest U.S. phone carriers are being squeezed by steep discounts on advanced cell phones, triggered by AT&T Inc's hefty subsidy for the iPhone.
　　AT&T, Verizon Communications Inc and Sprint Nextel Corp are expected to show a drop in wireless profit margins when they report third-quarter results in coming weeks, also feeling the pinch from consumers holding off on buying add-on services like data to lower their phone bills in the weak economy.
　　Wireless carriers have always shouldered part of a phone's cost to persuade customers to sign longer-term contracts, but U.S. market leader AT&T lowered the bar when it helped Apple Inc launch the latest iPhone for only $200 on July 11.
　　This forced Verizon Wireless, AT&T's biggest rival, and Sprint, the No. 3 U.S. mobile service, to follow suit with higher subsidies on their advanced phones, analysts said. While that helps boost service revenue in the longer term, it hurts near-term profits.
　　"The derivative effect is lower profitability in wireless for all the carriers," said UBS analyst John Hodulik, adding that the iPhone is selling faster than he expected, which is actually bad for AT&T's profitability in the short term.
　　tips:
　　AT&T Inc 美国电报电话公司
　　Verizon Communications Inc 弗莱森电讯公司
　　Sprint Nextel Corp.斯普林特- 奈克斯泰公司 （美国第三大无线电话公司）
　　UBS 瑞士联合银行
　　profit margin 利润率
参考译文：　　
　　因AT&T Inc公司对iPhone的投入了大量津贴，路透社在美国三大电话运营公司的
　　利益冲击下被挤压，不得不对高级电话打了折扣。
　　当汇报下面的第三季度的结果，AT&T, Verizon Communications Inc and Sprint
　　Nextel Corp这三大公司都料到利润率方面的下滑并感受到来自于每个持卡消费者都期望在低迷的经济下能够降低他们的消费单的压力。
　　无线电运营公司已经负担了部分电话考(试大消费，这迫使顾主签约了长期的合同。但是美国市场的领头AT&T降低了门槛。帮助苹果公司在7月11号投入最近的iPhone，只收200美元。
　　形式迫使Verizon Wireless, AT&T最大的对手、 Sprint, the No. 3 U.S. mobile service对高级电话做出适当的津贴投放。分析师说道。当这种形式在长期上帮助推动收入时，它影响了近期利益。
　　对所有运营公司而言这种波及出的影响降低了了无线电话的收益率。UBS分析师约翰分析道，并补充说iPhone出售的速度超过了他的预期，这一情况实际上对AT&T的收益率的坏影响是短期的。