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lumen
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〔SI导出单位〕
释
lumen
流明
国际单位制中光通量的单位。单位符号lm,用于表示从光源发出可见光的量。
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>光学>光度学和色度学>释义
lumen
流明
lumen
流明
光通量单位
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tropical rainforest
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tropical savanna climate
Tropical Seashore of Sanya Scenic and Historic Area
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tropical storm surge disasters in China
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