光學 guāngxué optics Definitions Defs Origin Strokes Stroke Words Sentences Sents 1 sentence 他使用该望远镜研究光学并证明他的光与色理论。 tā shǐyòng gāi wàngyuǎnjìng yánjiū guāngxué bìng zhèng míng tā de guāng yǔ sè lǐlùn. He used the telescope to study optics and to prove his theory of light and color. Source: CCMatrix
