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寒潮作为一种大范围的较强冷空气的活动过程，一般出现在每年初冬 (11月 )至次年的初春 (4月 )期间。寒潮的特征和气象指标是：气温一天将下降 10℃以上，当地最低气温在 5℃以下，一般还伴有降水 (雨或雪 )和偏北大风。 寒潮对人体健康的影响是很明显的。心血管病患者对寒
Cold wave as a wide range of relatively strong cold air activities, generally occur in early winter (November) to early spring (April) the following year. The characteristics of the cold wave and meteorological indicators are: the temperature will drop 10 ℃ a day or more, the local minimum temperature below 5 ℃, usually accompanied by precipitation (rain or snow) and northerly winds. The impact of cold on human health is obvious. Cardiovascular disease in patients with cold