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(四) 雾。雾天大部分发生在2—7月之间,约占全年雾日的90%。据统计,能见度小于和等于1公里者平均每年为26.5天。(五) 湿度。见表(2—3)。
(D) fog. Most of the fog occurred between February and July, accounting for about 90% of the foggy year. According to statistics, the average visibility of less than or equal to 1 km per person for 26.5 days. (E) Humidity. See table (2-3).