yellow fog meaning in English

黄雾翳

I shuddered as i stood and looked round me : it was an inclement day for outdoor exercise ; not positively rainy , but darkened by a drizzling yellow fog ; all under foot was still soaking wet with the floods of yesterday . the stronger among the girls ran about and engaged in active games , but sundry pale and thin ones herded together for shelter and warmth in the verandah ; and amongst these , as the dense mist penetrated to their shivering frames , i heard frequently the sound of a hollow cough
我站在那里，环顾四周，不觉打了个寒噤，这天的户外活动，天气恶劣，其实并没有下雨，但浙浙沥沥的黄色雾霭，使天色变得灰暗脚下因为昨天的洪水依然水湿，身体比较健壮的几位姑娘窜来奔去，异常活跃但所有苍白瘦弱的姑娘都挤在走廊上躲雨和取暖。