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n.流明(光通量单位);[植物](管)腔; 变形: 复数:lumina 英英释义: lumen[ 'lju:min ]n.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同义词:lma cavity o