beam with both ends built-in

例句：

1. 1. The beam of the light is shining through the window.
   光线从窗户中射出。
2. 2. The beam of the spotlight was shining on the stage.
   聚光灯的光束照在舞台上。
3. 3.The beam of the sun is shining brightly in the sky.
   太阳的光束在天空中明亮地照耀。