那个由电池控制的化学火焰的象征意义何在？

And what is the symbolic significance of a battery-operated chemical flame, anyway?

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我们曾试着燃烧化学物质，观察火焰的颜色。

We once tried to burn the chemicals and watch the colors of the flames.

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不同的化学物质会产生不同颜色的火焰，包括亮橙色和深绿色。

Different chemicals produced different colors of flames, including bright orange and dark green.

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