四环素荧光染色出现明亮黄色荧光钙结节。

Brilliant yellow calcium nodules appear by tetracycline fluorescence staining.

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每天晚上，它们明亮的黄色花朵会闭合。

Each night their bright yellow flowers close up.

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这一发现解释了秋天的颜色是黄色和橙色，而不是像枫树或漆树那样明亮的红色和紫色。

This unmasking explains the autumn colours of yellow and orange, but not the brilliant reds and purples of trees such as the maple or sumac.

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