alternating light

例句：

1. 1. The sun's rays are shining through the trees, creating a beautiful alternating light effect.
   阳光透过树梢，创造出美丽的交替光影效果。
2. 2.During the day, the sky is often filled with alternating light and dark patches.
   白天，天空常常被明暗相间的斑块所填充。
3. 3. The photographer captured the alternating light patterns on the lake surface.
   摄影师捕捉到了湖面上交替的光斑。