区分霾和雾，应该根据影响天气系统的变化，结合各种判据来确定。
To distinguish fog and haze should be based on the change of influencing weather system combining other influencing factors.
本设备结合了国内外同类产品的特点，采用变频控制，可根据天气温度变化、供料多少调整产量。
The equipment is combined with advantages of similar products in domestic and overseas and is adopted with Vraiable Frequency Control.
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。
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.
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