求翻译：利用常规的高空和地面资料对2009年11月中旬，华北出现的罕见的大范围暴雪过程中高低空急流特点、配置及对暴雪的影响进行了分析。结果表明，本次过程中存在两个高空急流和三个低空急流：极锋急流、副热带西风急流、低空偏南急流、低空偏北急流和超低空偏东急流，它们共同作用对本次暴雪天气起着非常重要的作用。低空偏南急流是在有利的的物理场配置下由高空急流耦合形成和发展的。低空急流是暴雪产生的重要因子，为暴雪区输送水汽和水汽辐合、产生不稳定层结，产生多种尺度的上升运动、触发中小尺度天气系统。是什么意思？

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Using the conventional upper air and the ground material to mid-November, 2009, in the rare wide range storm snow process which North China appeared the high low altitude jet stream characteristic, the disposition and has carried on the analysis to the storm snow influence.The result indicated that,

Using conventional height and surface information on mid-November 2009, during heavy snow North of rare large scope of high and low characteristics, configuration, and the jets to analysis of the impact of heavy snow. Results show that in this process there are two jet stream and three low level Jet