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The department of Environmental Conservation estimates the optimum population at 60.
出自-2013年12月听力原文
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His writing and speaking raised the awareness of the importance of conservation and helped bring about our national park system.
出自-2013年6月听力原文
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As conservation areas become smaller, lions are increasingly coming into contact with human populations, which are expanding to the boundaries of these protected areas.
2018年12月六级真题（第一套）阅读 Section A
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Efforts like painting eyes on cow butts may seem crazy at first, but they could make actual headway in the fight for conservation.
2018年12月六级真题（第一套）阅读 Section A
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Keith Reid, a science manager at CCAMLR, said that the organisation sought "a balance between protection, conservation and sustainable fishing in the Southern Ocean".
2019年12月六级真题（第二套）阅读 Section C
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Senator Hokkons Baules, lead sponsor of the Palau National Marine Sanctuary Act, said the sanctuary will "help build a secure future for the Palauan people by honoring the conservation traditions of our past".
2017年12月六级真题（第二套）阅读 Section A
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Staff from the Norwegian government have carried out conservation work on 10 of the churches over the past two years.
2019年12月六级真题（第一套）听力 Section C
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That's the highest percentage of an exclusive economic zone devoted to marine conservation by any country in the world.
2017年12月六级真题（第二套）阅读 Section A
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The Commission for the Conservation of Antarctic Marine Living Resources(CCAMLR) manages the seas around Antarctica.
2019年12月六级真题（第二套）阅读 Section C
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This is the story of wildlife conservation in the age of mass extinction.
2018年12月六级真题（第三套）阅读 Section A