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单词 θ76471
释义
the world > matter > physics > electromagnetic radiation > light > intensity of light, luminosity > [noun] > unit of light intensity > specific measurements (3)
candle-metre1908

the illumination of a standard candle at a distance of one metre.

lumen-hour1925

the quantity of light corresponding to a flux of one lumen radiated for one hour.

lumen-second1930

see lumen-hour n.

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更新时间:2024/12/24 8:33:42