degree day
短语度日，度日
词形变化
degree days
复数
释义与例句
n.
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1.
A measure of heating or cooling, computed as the integral of a function of time that generally varies with temperature.
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2.
A unit used in estimating the fuel consumption for a building; equal to the number of degrees that the mean temperature, for a 24-hour day, is below the base temperature, often 65F.