例句：
We saw light through a small aperture in the wall.
我们透过墙上的'小孔看到了亮光。
He stopped down the lens to a small aperture.
他把镜头光圈孔径缩小。
This results in the forward motion of the aperture.
这一结果在向前运动的光圈。
It is directly proportional to the square of the aperture.
它直接与孔径的面积成正比。
Large aperture space optical window has two features.
大口径高精度空间光学窗镜的技术特点有二。