aperture

US /ˈæp.ɚ.tʃɚ/
UK /ˈæp.ɚ.tʃɚ/
"aperture" picture
1.

孔, 縫隙, 光圈

a small opening or hole, especially one through which light or air may pass

:
The camera's aperture controls the amount of light entering the lens.
相機的光圈控制進入鏡頭的光量。
There was a small aperture in the wall, allowing us to peek through.
牆上開了一個小,我們可以從中窺視。