In fall, however, cooler and shorter days trigger an end to auxin production, allowing the abscission layer to grow and cut off the circulation of water, nutrients and sugar to the leaves.
英
美
释义
然而,在秋天,天气变冷、变短,这使得生长素停止生长,进而,隔离层自由生长,从而阻断了叶子的水、养料和糖的循环。
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