arc source

例句：

1. 1. The arc source is the main source of light in the room.
   弧光源是房间的主要光源。
2. 2. The arc source is responsible for the brightness of the room.
   弧光源负责房间的亮度。
3. 3. The arc source is used to create a warm and cozy atmosphere in the room.
   弧光源用于在房间中创造温暖舒适的氛围。