exposure counter

例句：

1. 1. The exposure counter was usedto measure the amount of light that passedthrough the camera lens.
   曝光计数器用于测量通过相机镜头的光线量。
2. 2. The exposurecounter was used to adjust the aperture of the camera to achieve the desiredexposure.
   曝光计数器用于调整相机的光圈以达到所需的曝光效果。
3. 3. The exposurecounter was used to monitorthe exposure level of the imageduring the shooting process.
   曝光计数器用于在拍摄过程中监测图像的曝光水平。