| 单词 | f-number |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔aperture〕The diameter of such an opening, often expressed as an f-number.孔径：这种开口的直径，常以f数表示美国传统〔f-stop〕A camera lens aperture setting that corresponds to an f-number.f制光圈：以f表示的调节照相机镜头的孔径的装置美国传统〔f-system〕A method of indicating the relative aperture of a camera lens based on the f-number.f制：一种用f表达照相机镜头光圈大小的方法美国传统 |
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