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为什么会产生季节变化？

季节变化是地球运行轨道和自转倾斜角度的结果。地球绕太阳运行的轨道是椭圆形的，而不是圆形，因此在不同的时间，地球距离太阳的距离会产生细微的变化。此外，地球的自转轴倾斜23.5度，使得不同地区在不同时间受到的阳光照射角度也会有所变化。这两个因素联合起来，导致了季节的变化。

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