(chiefly technical)an opening, hole, or gap (主 技)开口,孔,缝隙 the bell ropes passed through apertures in the ceiling. 敲钟绳从天花板上的缝隙中穿过。 ■a space through which light passes in an optical or photographic instrument, especially the variable opening by which light enters a camera (光学仪器或照相设备上的)孔径(尤指照相机上可调节的光圈)
语源
late Middle English : from Latin apertura, from apert- 'opened', from aperire 'to open'