limiting aperture

例句：

1. 1.The camera's limiting aperture is too small for this scene.
   这张照片的镜头限制孔太小了，不适合这个场景。
2. 2.The scientist used a microscope to observe the tiny limitling aperture of the cell.
   科学家用显微镜观察细胞的微小限制孔。
3. 3.The engineer adjusted the machine's limiting aperture to increase its efficiency.
   工程师调整机器的限制孔，以提高其效率。