| 单词 | degree-day | 
| 释义 | degree-day [di`grē ´dā]  MECHANICAL ENGINEERING A measure of the departure of the mean daily temperature from a given standard; one degree-day is recorded for each degree of departure above (or below) the standard during a single day; used to estimate energy requirements for building heating and, to a lesser extent, for cooling.  | 
	
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