55 篇文章
but the dry season is so severe that the trees can't afford to loose the amount of water that would evaporate from their broad leaves,
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but the dry season is so severe that the trees can't afford to loose the amount of water that would evaporate from their broad leaves, 在炎热干燥的季节 树木无法承受水分从叶子上的大量流失

The threat of winter frost is not the only reason for trees to shed leaves.
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The threat of winter frost is not the only reason for trees to shed leaves. 寒冬的威胁不是树木落叶的唯一原因

and the trees must shut down and shed their leaves in preparation for the cold dark time ahead.
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and the trees must shut down and shed their leaves in preparation for the cold dark time ahead. 树木开始减缓代谢,树叶开始凋零, 以准备迎接寒冬的到来

In the treetops, the broad leaves rapidly expand to their full size to make the most of summer while it lasts.
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In the treetops, the broad leaves rapidly expand to their full size to make the most of summer while it lasts. 在树梢 树叶很快生长开来并保持这个状态一直到夏末

With no leaves overhead, the rays of the sun strike the forest floor directly
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With no leaves overhead, the rays of the sun strike the forest floor directly 由于没有树叶遮蔽,阳光可以直射到森林地表上

There are no leaves for cover and no young prey animals.
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There are no leaves for cover and no young prey animals. 没有树叶可以掩护,没有幼小的猎物

Leaves that have provided food and shelter since the spring, are now shed.
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Leaves that have provided food and shelter since the spring, are now shed. 从春天开始提供给动物食物和掩护的树叶 开始脱落了

and all across the northern hemisphere the broad leaves are hard at work.
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and all across the northern hemisphere the broad leaves are hard at work. 所有北半球的阔叶树木努力生长

Being broad, these leaves trap much more light than needles
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Being broad, these leaves trap much more light than needles 不仅叶子能比针叶吸收更多阳光

The pudu, the world's smallest deer feeds on the giant leaves of the gunnera plant.
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The pudu, the world's smallest deer feeds on the giant leaves of the gunnera plant. 智利普度鹿 世界上最小的鹿之一,正在吃根乃拉草的大叶子