定距尺度(interval)—在定距尺度中，任意两个相邻测量单位之间的距离(也称为间距)是相等的，但零点是任意的。
Interval - an interval scale is a scale of measurement in which the distance between any two adjacent units of measurement (also known as intervals) is the same, but the zero point is arbitrary.
译者注：色温是表示光源光色的尺度，单位为K开尔文。色温是在摄影、录象、出版等领域具有重要应用。
Kelvins: a CFL's color is indicated by the Kelvin (k) temperature (listed on the package).
科学家们用“空洞”一词表示臭氧浓度低于220个多布森单位（多布森单位是用来度量大气中臭氧柱尺度的单位。
Scientists use "hole" as a metaphor for the area in which ozone concentrations drop below the historical threshold of 220 Dobson Units.
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