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  1. Oxford American Dictionary

    aperture

    • IPA[ˈapərˌCHo͝or]

    美式

    • n.
      an opening, hole, or gap；a space through which light passes in an optical or photographic instrument, especially the variable opening by which light enters a camera

    • noun: aperture, plural noun: apertures

    • 釋義

    名詞

    • 1. an opening, hole, or gap the bell ropes passed through apertures in the ceiling
    • ▪ a space through which light passes in an optical or photographic instrument, especially the variable opening by which light enters a camera a refracting telescope with an aperture of 3 inches