color signal source

例句：

1. 1. The color signalsource is essential for the safety of the construction site.
   彩色信号源对于施工现场的安全至关重要。
2. 2.The new color signal source has greatly improved the efficiency of our production line.
   新的彩色信号源大大提高了我们生产线的效率。
3. 3.The color signal source was used to indicate the presence of hazardous materials in the area.
   彩色信号源被用来指示该区域存在危险物质。