| 单词 | θ64863 | 
| 释义 | the world > physical sensation > sight and vision > optical instruments > instruments to refract, etc., light > 			[noun]		 (34)		 Subcategories:— 			refractor			(2)		 — 			prism			(7)		 — 			optic axis			(1)		 — 			diffraction grating			(2)		 — 			reflector			(4)		 — 			holophote			(1)		 — 			polariscope			(11)		 — 			image tube			(4)		 — 			optical indicatrix			(1)		 — 			image formed by refracted light			(1)		  | 
	
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