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赶英超美灭日:没有看懂。 (2013-08-02 21:24)
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啰啦a梦:就是四季转换嘛 (2013-08-03 16:27)
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lnrzk:图中文字说了是冰山了。冰山都到了半个北半球 (2013-08-03 16:51)
九寨沟亚龙湾:是说每年的植被与冰雪覆盖节奏变化······ (2013-08-04 11:50)
lnrzk:冰雪每年覆盖到了五大湖? (2013-08-05 00:20)
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坤舆任我行:其实不奇怪,广东不是偶尔都下雪吗?五大湖比广东北多了。 (2013-08-05 00:43)