- 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 - Great tracts of North America flush red as the season progresses.
随着季节的变换 北美的大片地域万山红遍,层林尽染 - 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
that it can be seen from space. 甚至可以在太空中看到
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