单词：systema digestoriums
(systema digestorium 的复数)
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AS IT IS 2015-09-01 Andean Glaciers Reveal Secrets of Climate Change 安第斯冰川揭示气候变化的秘密 Ice caps, very large sheets of ice, do not only exist at the earths poles. There are tropical ice caps in mountain ranges, too. The larges
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083 the natural world Worlds River lake stream pool coast sea ocean waterfall cliff rocks mountain hill valley cave forest island peninsula mountain range desert sand dune peak plateau climate erosion Phrases Erode rocks Change the landscape Dominate
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Volcano 火山 Many mountains are the result of volcanoes. 许多山峰都是火山的产物。 A long time ago, many mountains were formed by volcanic activity. 很久以前，很多山峰都是由火山运动形成的。 When a volcano explodes, it
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