Through the aperture he could see daylight.透過縫隙，他能看見日光。
N-COUNT
（照相機的）光圈，孔徑
In photography, the aperture of a camera is the size of the hole through which light passes to reach the film.
例句
Use a small aperture and position the camera carefully...用小光圈，仔細調整相機位置。The camera has a 32mm lens with a maximum aperture of f/4.5 and a fixed shutter speed of 1/100sec.這架相機有一個32毫米的鏡頭，最大孔徑為f/4.5，固定快門速度為1/100秒。
英漢詞典釋義
n.
孔, 縫隙，空隙
Into this aperture a droplet of mercury was poured.一小滴水銀滴進了這個小孔。
英英詞典釋義
Noun
1. a device that controls amount of light admitted