It was an extremely cold winter's evening and freezing fog hung in the air.
那是一个极为寒冷的冬夜,空气中弥漫着冰冷的雾气。
英语百科
Fog
Fog is a visible mass consisting of cloud water droplets or ice crystals suspended in the air at or near the Earth's surface. Fog can be considered a type of low-lying cloud and is heavily influenced by nearby bodies of water, topography, and wind conditions. In turn, fog has affected many human activities, such as shipping, travel, and warfare.