brightness variation

例句：

1. 1. The camera's brightness variation is quite impressive.
   相机的亮度变化非常令人印象深刻。
2. 2. The new software has asignificant brightness variation compared to the previousversion.
   与之前的版本相比，这款新软件的亮度变化显著。
3. 3. During the day, thesky's brightness variation canbe observed from the observation deck.
   在白天，可以从观景台上观察到天空的亮度变化。