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The question is often asked whether every butterfly makes the round trip journey every year.
出自-2014年6月听力原文
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What is the unique about the monarch butterfly according to the speaker
出自-2014年6月听力原文
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Where does the butterfly settle at the end of the migration?
出自-2014年6月听力原文
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Environmental impacts on monarch butterfly life
出自-2014年6月听力原文
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What makes monarch butterflies particularly interesting is they migrate, all the way to California or Mexico in back.
出自-2014年6月听力原文
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The butterflies are so numerous that they often cover the entire trees
出自-2014年6月听力原文
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Each flock of butterflies lays eggs in the same states.
出自-2014年6月听力原文
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Evolution of monarch butterflies
出自-2014年6月听力原文
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Living habits of monarch butterflies.
出自-2014年6月听力原文
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Migration patterns of monarch butterflies
出自-2014年6月听力原文
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She made other mistakes in Metamorphasis Insectorum Surinamensium as well: not every caterpillar and butterfly matched.
2018年12月六级真题（第二套）阅读 Section B