weak light source

例句：

1. 1. The weak light source from the flashlight barely illuminated the room.
   手电筒发出的微弱光线几乎无法照亮房间。
2. 2.The dim light source in the room cast long shadows on the wall.
   房间里昏暗的光线在墙上投下长长的影子。
3. 3.The weak light source was not sufficient to read the text clearly.
   微弱的光源不足以清晰地阅读文本。