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。
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。
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。
The main period of egg hatching, which is the favourable opportunity for its control, lasts ho the flower fall- en to the first leaf Spreda out.
越冬卵孵化盛期为落花后至第一片叶展开之际，这是防治的有利时机。
Because of the shading of wood leaf layers and litter fall, soil evaporation and the range of soil moisture contents changing were small under forest canopy.
受冠层覆盖及植被根系影响，随着树干距离的增加，土壤含水率呈减少趋势。
Because of the shading of wood leaf layers and litter fall, soil evaporation and the range of soil moisture contents changing were small under forest canopy.
受冠层覆盖及植被根系影响，随着树干距离的增加，土壤含水率呈减少趋势。
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