| 释义 |
focal ratio 【摄影术】f值,孔径焦距比 以上来源于:《21世纪大英汉词典》 focal ration.=f-number详细释义源自:《新世纪英汉大词典》Collins外研社 n= f-number英英释义n.the ratio of the focal length to the diameter of a (camera) lens system同反义词同义词:f numberspeedstop number英汉大英汉大★◀▶英汉大☞f number英汉大☞BEfocal rat |