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入冬以后,气温一天比一天低,“敞着口”接触空气并不断地同空气进行气体交换的河、塘、湖、库水温也一天比一天低。尽管水温下降的速度比气温
After winter, temperatures are getting lower and lower day by day. “Open mouths” "The temperatures of rivers, ponds, lakes and reservoirs that contact the air and constantly exchange gas with air are getting lower and lower day by day. Although the water temperature dropped faster than the temperature