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And it goes some way towards explaining why books about swimming, in which people tackle icy lakes, and overcome oceans while reflecting on their lives have recently become so popular.
2018年12月六级真题（第一套）听力 Section B
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Most of these operations draw irrigation water from local rivers or lakes.
2016年6月六级真题（第二套）阅读 Section C
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Three-quarters of the world's flamingos fly over from other salt lakes in the Rift Valley and nest on salt-crystal islands that appear when the water is at a specific level一too high and the birds can't build their nests, too low and predators can move bri
2017年12月六级真题（第三套）阅读 Section C