例句：

　　We saw light through a small aperture in the wall.

　　我們透過墻上的小孔看到了亮光。

　　He stopped down the lens to a small aperture.

　　他把鏡頭光圈孔徑縮小。

　　This results in the forward motion of the aperture.

　　這一結果在向前運動的光圈。

　　It is directly proportional to the square of the aperture.

　　它直接與孔徑的面積成正比。

　　Large aperture space optical window has two features.

　　大口徑高精度空間光學窗鏡的技術特點有二。