1. a device that controls amount of light admitted

2. a natural opening in something

3. an man-made opening; usually small

1.孔；缝隙；缺口
Anaperture is a narrow hole or gap.

e.g. Through theaperture he could see daylight.
透过缝隙，他能看见日光。

2.（照相机的）光圈，孔径
In photography, theaperture of a camera is the size of the hole through which light passes to reach the film.

e.g. Use a smallaperture and position the camera carefully...
用小光圈，仔细调整相机位置。
e.g. The camera has a 32mm lens with a maximumaperture of f/4.5 and a fixed shutter speed of 1/100sec.
这架相机有一个32毫米的镜头，最大孔径为f/4.5，固定快门速度为1/100秒。

1. 孔径：ess 功能 孔径(aperture)切换功能 10 级可调(-5-+5) LENS SETUP 简易后焦点调整功能 电子快门速度:可选关闭或 1/50 秒-1/50000 秒 屏幕字符显示:16 个字母或数字符号 电缆补偿功能 CHROMA 图象色度/色相调整功能(调整范围-5-+5) 图像隐私遮盖功能:最多 8 个区域遮盖 远程通讯控制接口 RS485,

2. 孔：血管内溶剂、溶质与组织液的交换主要通过毛细血管内皮完成的,水通过内皮细胞膜,更多溶质通过内皮细胞裂孔(aperture)筛孔(fenestration)和非连续内皮连接(discontinuous endothelium),大分子通过内皮细胞之间裂缝(cleft),