辐射雾经常形式在深秋和冬天的夜晚，特别是在较低的地区，因为寒冷和沉重的空气流动下坡，并收集在山谷。

Radiation fog often forms in late fall and winter nights, especially in lower areas, because cold and heavy air moves downhill, and gathers in valleys.

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辐射雾经常形式在深秋和冬天的夜晚，特别是在较低的地区，因为寒冷和沉重的空气流动下坡，并收集在山谷。

Radiation fog often forms in late fall and winter nights, especially in lower areas, because cold and heavy air moves downhill, and gathers in valleys.

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