英语词汇“focal ratio”的中英文释义、用法、翻译及短语词组-英汉翻译词典

单词	focal ratio
释义	focal ratio 英?[?f??k?l ?rei?i?u] 美?[?fok?l ?re?o] 释义焦比英英释义 Noun 1. the ratio of the focal length to the diameter of a (camera) lens system
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focal ratio