aperture

1. N-COUNT An aperture is a narrow hole or gap. 孔隙[正式]

Through the aperture he could see daylight. 通过这个孔隙他能看到日光。

2. N-COUNT In photography, the aperture of a camera is the size of the hole through which light passes to reach the film. (相机镜头的) 孔径

Use a small aperture and position the camera carefully. 使用小孔径并且小心地安放好照相机。