Moreover, the problem of oversensitivity to light is even more acute in the fall, when the leaf is busy preparing for winter by dismantling its internal machinery.

此外，对阳光过度敏感的问题在秋天更为严重，因为此时叶子正忙着通过“拆卸内部机构”为冬天做准备。

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The weakened fall leaf then becomes vulnerable to the highly destructive effects of the oxygen created by the excited chlorophyll molecules.

活跃的叶绿素分子产生的氧气破坏性强，秋天衰弱的树叶随后变得更容易受到影响。

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In much the same way, the dazzling orange, red and yellow displays of forests in fall may be warning would-be leaf munchers of a tree's chemical defenses.

同样地，秋天的树林呈现出橘、红、黄等让人眼花撩乱的色泽，也可能是树木的一种化学防御方式，对可能的食叶动物发出警告。

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the fall of the yellowed,dry leaf.

VOA: special.2010.02.27

Under an expanded New Electric Vehicle Limited Warranty, Nissan will protect against capacity loss in LEAF batteries that fall below nine bars, of the available 12 bars displayed on the vehicle's battery capacity gauge, for the first five years or 60, 000 miles in the United States, whichever comes first.

ENGADGET: Nissan upgrades US Leaf warranties, will 'restore' batteries that lose too much charge