lumen
音標['lu:min]中文翻譯：
n. 流明, 腔
【醫】 腔, 流明(光通單位)
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英文解釋：
名詞 lumen:
- a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions同義詞：lm
- a cavity or passage in a tubular organ
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