| 单词 | day-degree |
| 释义 | > as lemmasday-degree day-degree n. a number equal to degrees of temperature multiplied by the number of days when that temperature was maintained.The term was introduced in the context of Meteorology typically to express the excess above some standard or average temperature; in Agriculture and Biology it can also refer to the temperature as measured. ΚΠ 1884 R. Strachey in Q. Weather Rep. 1878 (Meterol. Office) App. II. 13 The natural unit by which to reckon the accumulated excess temperature would be one degree continued for the unit of time, either one hour or one day... Such an unit..might be called the ‘hour-degree’ or ‘day-degree’. 1922 Ecology 3 133 In southern Georgia the potential thermal constant for this crop is, when computed from the accumulated day-degrees of temperature above the average.., is over 4,000°. 1951 M. A. Amerine & M. A. Joslyn Table Wines xvii. 267 (caption) Fresno—4,680 day-degrees of temperature above 50° Fahrenheit during the growing season. 2002 R. B. Kindness in S. M. Stead & L. Laird Handbk. Salmon Farming ii. 57 An egg incubated at 5°C for ten days has a development stage equivalent to 50 day-degrees, which is almost the same as an egg incubated at 10°C for five days... The day-degrees for a particular stage decrease slightly if the incubation temperature is higher. < as lemmas |
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