It is cloudy phenomenon because the air suspension with a lot of smoke, dust particles encountered water formed, make the line of sight fuzzy and lead to decreased visibility.

这是因为随着浑浊现象的大量烟雾的空气悬架，尘埃颗粒会形成的水，使视线模糊，导致能见度降低。

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Classifies the determination methods into those by temperature profiles, visibility profiles and combustion product concentration profiles in terms of characteristic parameters of smoke.

基于烟气特性参数将烟层界面的判定方法分为温度判定法、能见度判定法和燃烧产物浓度判定法。

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The confusion occurred despite the introduction that year of an auxiliary smoke-emitting device aimed at improving the visibility of the smoke.

CNN: March 13, 2013 -- Updated 0018 GMT (0818 HKT)

However, a nearby fire was the biggest talking point of the opening half an hour, with visibility increasingly difficult as smoke bellowed over St Andrew's.

BBC: Birmingham 0-2 Wolves

"An inversion layer is keeping the smoke close to the ground, limiting visibility and reducing helicopter air operations, " Berry said.

CNN: Firefighters make headway in California wildfire