defocusing effect

例句：

1. 1. The camera's lens was slightly defocused when the subject moved too close.
   当被摄物体靠近时，相机镜头略有失焦。
2. 2.The scientist observed that the defocusing effect caused by the dust particles was significant.
   科学家观察到，由尘埃颗粒引起的失焦效应是显著的。
3. 3. The experiment demonstrated the importance of maintaining a clear field of view to avoid any defocusing effects.
   实验表明，保持清晰的视野范围以避免任何失焦效应的重要性。