a sort of brightness
一种光亮
以上为机器翻译结果，长、整句建议使用 人工翻译 。
A luminosity function is the number of objects of a particular sort as a function of their luminosity or brightness in some wavelength band.
光度函数是作为某一波段的光度或亮度的函数的特定种类的天体数目。
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Rounding out the new set's photographic prowess is a unique LED flash with support for 5 levels of automatic brightness control and a front facing 1.3 megapixel number that'll sort your 720p HD needs.
ENGADGET: HTC One X announced at MWC 2012 Mobile
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