aperture

aperture
[ˈapətʃə, -tj(ʊ)ə]
noun
  1. (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
  1. late Middle English : from Latin apertura, from apert- 'opened', from aperire 'to open'
英语宝典
考试词汇表