深秋时节是气温变化最频繁的时段。一方面,气候本身决定了秋季气温日较差较大,也就是说,在同一天中,早晚气温低,中午气温高。另一方面,深秋时节,冷空气活动最为活跃,每次冷空气入侵,都会带来大幅度的降温,前几天与后几天,甚至相邻的两天,温差也常常大得惊人。 Autumn season is the most frequent time of temperature changes. On the one hand, the climate itself determines that the autumn day temperature is far worse, that is, on the same day, the temperature is lower in the morning and the night, and the temperature is higher at midday. On the other hand, during the autumn season, the cold air activities are most active. Each time the cold air invades, it will bring about a substantial cooling. A few days ago and a few days later, even the adjacent two days, the temperature difference is often staggering.