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America
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Byrd
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Climatic factor
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Grassland vegetation type
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Natural grassland
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Vegetation zone
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ZZ27
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expedition
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気候要因
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自然草原
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草原植生型
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草原植生帯
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Antarctic
2
Glacial relict
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The Drama of the Pacific
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sea power
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気候変動
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Active learning
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Alpine Plants
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Alpine tundra
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Antarctica
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Arctic Oscillation
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Autobiography of Fukuzawa Yukichi
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Avery
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B.B.C
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BBC
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Bukovina
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Circumpolar plants
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Climate Change
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Climate change
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