The energy absorbed by the chlorophyll molecules of the unstable autumn leaf is not immediately channelled into useful products and processes, as it would be in an intact summer leaf.

不稳定的秋叶叶绿素分子吸收的能量，不会像在完好的夏叶中吸收的能量那样立即传输到有用的产品和工艺流程中去。

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When it's an autumn leaf.

当这张叶子是一张秋天的叶子时。

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Autumn Leaf wreath Display: Buy a grapevine or straw wreath.

秋叶花环：买一个葡萄藤或者麦秆做的花环。

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The air smelled of autumn, of leaf raking, of the dependable and virtuous Midwest.

NEWYORKER: Great Experiment