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The rainforest's great diversity has come at a cost. It has made them the most finely balanced ecosystems in the world
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The rainforest's great diversity has come at a cost. It has made them the most finely balanced ecosystems in the world 雨林的物种多样性正在消失 而雨林却是维持地球生态系统微妙平衡的关键

ecosystems balanced finely cost rainforest's diversity great most come made at has it in world them the a
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