Warning: file_put_contents(/www/wwwroot/zidian/oumou.cn/cache/1f8bc6caffbc7ccbb4eccf81588c6f41.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/oumou.cn/index.php on line 58 f-number英英字典_f-number剑桥英语解释_f-number柯林斯英文解释_欧米惠必应词典
1. N the numerical value of the relative aperture. If the relative aperture is f8, 8 is the f-number and indicates that the focal length of the lens is 8 times the size of the lens aperture 焦距比数[photog] →see alsoT-number