1. optical spectrum light source 
   光谱光源
2. A source of light. 
   光亮源
3. A source of light, as a candle. 
   光源光源，如蜡烛
4. any device serving as a source of visible light. 
   任何能作为可见光源的装置。
5. something that can serve as a source of light. 
   能作为光线来源的物体。

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