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Contents ·No. 1 ·jiāo jù ·No. 3 ·English Expression ·French Expression ·Thesaurus ·Related Phrases ·More results... No. 1 焦距 　　Curved mirror or a thin lens vertex to the main focus of the center of the distance. Translated by Google jiāo jù 　　By a lens or concave mirror to the main focus of the main point of the distance Translated by Google No. 3 　　From the center of a spherical mirror or lens to the main focus of the distance. Shipping Gazette "Huoqixiaoqiang": "You will focus much of the background was visible, but before this poll was not a little on the vague outline." See also "focus." Translated by Google English Expression :  distance between the centre of a mirror or a lens and its focus,  focal distance n.:  focus,  focal distance [length],  focal length vt.:  refocus French Expression n.  distance focale Thesaurus focus Related Phrases language filming depth of field frame danfan