... 贫瘠地 贫瘠土壤 poorsoil 贫瘠的土壤 dead soil 在贫瘠的土壤中 in poor soil ...
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dead soil covering 枯枝落叶层
He and his team studied tree mass, dead wood and soil carbon in twenty-five mangrove ecosystems in the Indian and Pacific Oceans.
VOA: special.2011.05.10
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