“lumen”的概念、定义、翻译、参考文献-科学参考

单词	lumen
释义	lumen [`lü·mǝn] ^ANATOMY The interior space within a tubular structure, such as within a blood vessel, a duct, or the intestine. ^OPTICS The unit of luminous flux, equal to the luminous flux emitted within a unit solid angle (1 steradian) from a point source having a uniform intensity of 1 candela, or to the luminous flux received on a unit surface, all points of which are at a unit distance from such a source. Symbolized lm. ^{SCIENCE AND TECHNOLOGY} The space within a tube.
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