flame colouration

例句：

1. 1.The artist applied a layer of flame-colouring paint to create a stunning effect on the canvas.
   艺术家在画布上涂了一层火焰颜色的油漆，创造出惊人的效果。
2. 2.The scientist discovered that the flame-colouring properties of the substance could be used to detect pollutants in the air.
   科学家发现这种物质的火焰颜色特性可以用来检测空气中的污染物。
3. 3. During the experiment, the flame-colouring effects were observed and recorded for future reference.
   实验期间，观察到的火焰颜色效应被记录下来，以供将来参考。