科学素养与生活应用·英语30篇（3）
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Why Leaves Change Color in Fall
秋天树叶为什么会变色
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In fall, days get shorter and temperatures drop steadily.秋季，白昼变短，气温持续下降。
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Trees stop making green chlorophyll to save energy and water.树木停止制造叶绿素以节省能量和水分。
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Yellow and orange pigments were always present but hidden before.黄色和橙色色素原本就存在，只是此前被掩盖了。
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Red colors form when sugars get trapped in leaves during cool nights.凉爽夜晚中糖分滞留在叶片里，从而形成红色。
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Soil nutrients and weather affect how bright colors appear each year.土壤养分和天气影响每年秋叶色彩的鲜艳程度。
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Scientists study leaf chemistry to understand climate change effects.科学家通过研究叶片化学成分来了解气候变化的影响。
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This natural process helps trees rest before winter arrives.这一自然过程帮助树木在冬季来临前休眠。
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Each color tells a story about light, temperature, and plant health.每种颜色都诉说着光照、温度和植物健康的故事。