degree-day

名词 degree-day:

1. the day on which university degrees are conferred
   同义词：commencement day, degree day
2. a unit used in estimating fuel requirements for heating a building
   同义词：degree day

de.gree-day

n.（名词）
A unit of measurement equal to a difference of one degree between the mean outdoor temperature on a certain day and a reference temperature, used in estimating the energy needs for heating or cooling a building.
度-日：一测量单位，等于某一天户外温度的平均值和一参照温度之间一度的差别，用来估计加热或冷却一座建筑物所需要的能量