main weather systems 主要天气系统
mesoscale weather systems 中尺度系统
mid-latitude weather systems 中纬度系统
In flood clustering analysis of the Biliuhe reservoir，the cause analysis and the clustering analysis are combined to determine the typical floods of the different weather systems and carry out the reservoir flood operation design with classified forecasts.
碧流河水库洪水聚类，遵循了成因分析和聚类分析相结合的原则，其目的是确定各类主要天气系统的典型代表过程，以便进行水库防洪分类预报调度设计。
参考来源 - 洪水聚类有效性分析—《南水北调与水利科技》—2007年第2期—龙源期刊网·2,447,543篇论文数据，部分数据来源于NoteExpress
They found the highest levels of solar activity cause small, but far-reaching effects on weather systems around the world.
VOA: special.2009.09.29
Reports say the study may lead to better predictions of temperatures, rainfall and the intensity of weather systems.
VOA: special.2009.09.29
Both events can have important effects on weather systems and climates around the world.
VOA: special.2009.09.29
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