beam widening

例句：

1. 1. The beam of the light was so wide that it illuminated the entire room.
   光线的光束非常宽，照亮了整个房间。
2. 2. As the beam widened, the image on the screen grew clearer.
   随着光束变宽，屏幕上的图像变得更加清晰。
3. 3. The beam widening is a natural phenomenon that occurs when the sun's rays are reflected off water droplets in the atmosphere.
   光束变宽是一种自然现象，当太阳光线在大气中的水滴上反射时会发生。