beam-limiting aperture

例句：

1. 1.The camera's beam-limiting aperture is very small, which makes it difficult to capture the entire scene.
   相机的光束限制孔径非常小，这使得捕捉整个场景变得很困难。
2. 2.The scientist used a beam-limiting aperture to study the properties of light.
   科学家使用光束限制孔径来研究光的性质。
3. 3. The engineer designed a beam-limiting aperture to reduce the amount of light that enters the camera.
   工程师设计了一个光束限制孔径，以减少进入相机的光量。