十万个为什么·科学阅读30篇（6）
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Why Do Some Trees Lose Leaves in Winter?
为什么有些树在冬天落叶？
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Trees lose leaves to save water in cold months.树木在寒冷月份落叶以节约水分。
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Winter air is dry, and roots cannot absorb enough water.冬天气温低、空气干燥，树根无法吸收足够水分。
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Leaves have many tiny holes that let water escape.叶片上有许多微小气孔，会导致水分流失。
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By dropping leaves, trees stop losing precious water.通过落叶，树木停止流失宝贵的水分。
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New leaves grow again when spring warmth returns.春暖花开时，新叶会重新长出。
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This helps trees survive freezing temperatures safely.这有助于树木安全度过冰冻低温。
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Evergreen trees keep leaves but have special waxy coatings.常绿树虽保留叶片，但表面有特殊的蜡质层。
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All trees adapt their leaf habits to local climates.所有树木都会根据当地气候调整其落叶习性。