- The effect is so spectacular and so extensive
这种壮观的景象发生的地域之广 - that it can be seen from space.
甚至可以在太空中看到 - 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 - These forests stand in the tropics.
这片森林在热带地区 - Here day length never changes
在这里白昼没有变化 - 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 - so the leaves must be shed.
所以,必须落叶
These forests stand in the tropics. 这片森林在热带地区
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