compound shutter

例句：

1. 1. The new camera has a compound shutter that allows for smooth and precise exposure.
   这款新相机配备了复合式快门，可以实现平滑且精确的曝光。
2. 2.The compound shutter is designed to reduce the amount of light needed for photography.
   复合式快门的设计旨在减少摄影所需的光线量。
3. 3.In the darkroom, the compound shutter is used to control the exposure of the film.
   在暗室中，复合式快门用于控制胶片的曝光。