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Writing in the journal, the scientists describe how the storks from Germany were clearly affected by the presence of waste sites, with four out of six birds that survived for at least five months overwintering on rubbish dumps in northern Morocco, instead of migrating to the Sahel.
出自-2017年6月阅读原文
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They gradually lose the habit of migrating in winterThey prefer rubbish dumps far away to those at home.
出自-2017年6月阅读原文
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Migrating birds affect ecosystems both at home and at their winter destinations, and disrupting the traditional routes could have unexpected side effects.
出自-2017年6月阅读原文
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Salmon also carry dangerous chemicals as the fish migrate between rivers and the sea.
出自-2016年12月听力原文