“三光”是个多义词，它可以指三光（俗语）, 三光（天文学术语）, 三光（医学术语）, 三光（和面技巧）, 三光（文学）, 三光（佛教名词）, 三光（日本侵华政策）。
光学组件包括第一光管、第二光管及第三光管。
Optical module includes first light pipe, second light pipe, and third light pipe.
在昼夜看不到日、、三光的浓雾中，我参观了大英博物馆。
When the sun, the moon and the stars were hidden behind the thick fog day and night, I visited the British Museum.
第三光管邻置于第一光管及第二光管，用以汇集第一光线及第二光线，并输出第三光线。
Being located adjacent to first and second light pipes, the third light pipe is in use for collecting first and second beams, and outputting third beam.
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