Related topics: Photography
ap·er·ture /ˈæpətʃə $ ˈæpərtʃʊr/ noun [countableC] 1. HOLE formal a small hole or space in something 孔,缝隙
2. TCPthe small hole at the front of a camera, which can be made larger or smaller to let more or less light in when you take a photograph 〔照相机的〕光圈,孔径