The weather forecast, in synoptic meteorology, have three methods:pressure field ana-lysis, energy field analysis and entropy field analysis.
天气学天气预报经历着气压场分析方法，能量场分析方法和我们提出的熵场分析方法。
The thesis discusses the trough line, which takes an important role in synoptic system on the base of describing the application requirement and present situation of forecast analysis.
本文从应用需求角度出发，结合天气预报分析现状，对在天气变化中扮演重要角色的“槽线”进行了分析探讨。
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