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词汇
focal ratio
释义
focal ratio
ˈfəʊkəlˈreiʃiəu
基本
英英
近义反义
n.
焦距比数
Noun:
the ratio of the focal length to the diameter of a camera lens system
近义词
speed速度
f number焦距比数
stop number光圈数
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更新时间:2025/4/4 0:53:05