You've probably heard that leaves of deciduous trees change color in autumn because they lose their green chlorophyll molecules, allowing the underlying yellow-orange pigments to shine through.
你可能听过这种说法：落叶树在秋天变色是因为它们失去了令它们绿的叶绿素，于是下层的黄橙色素就显出了颜色。
What is still not fully understood, however, is why some trees resort to producing red pigments while others don't bother, and simply reveal their orange or yellow hues.
然而，至今仍不完全清楚，为什么有些树木倾向于制造红色素，而有些树木不去刻意制造色素，但还是会呈现出橙色或黄色。
Most of the protein is contained in the egg white, while vitamins, minerals, fats, carotenoids (orange/red/yellow pigments) and cholesterol are contained in the yolk.
大部分蛋白质存在于蛋清中，而维生素、矿物质、脂肪、类胡萝卜素和胆固醇则存在于蛋黄中。
Caroteinoids, which have a range of diverse biological functions and actions, are orange, yellow, or red pigments present in all plastids.
类胡萝卜素是一类橘黄、黄色或红色的色素，存在于质体中，具有许多不同的生物功能和生物活性。
Either way, with the bright green molecules gone, yellow and orange pigments that were there all along (helping with photosynthesis), are no longer overshadowed, and ta-ta!
无论如何随着绿色分子的消失，黄色和橙色的色素却一直都在(协助进行光合作用)叶子不再褪色当当当当！
Either way, with the bright green molecules gone, yellow and orange pigments that were there all along (helping with photosynthesis), are no longer overshadowed, and ta-ta!
无论如何随着绿色分子的消失，黄色和橙色的色素却一直都在(协助进行光合作用)叶子不再褪色当当当当！
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