| 单词 | luminous flux unit |
| 释义 | luminous flux unit (extremely rare) n WORD FAMILY luminous flux unit n a measure of luminous flux per unit area Hypo|Hyper lm, 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 light unit a measure of the visible electromagnetic radiation |
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