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积水沼泽
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积水沼泽
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退化湿地生态修复
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积水沼泽
积水沼泽是水供给全部来自天然降水的一种湿地生态系统,一般呈酸性并含有较贫瘠的营养元素。通常积水沼泽具有三个基本特征:地表经常过湿或有薄层积水;其上生长湿生植物或沼生植物;有泥炭积累或无泥炭积累,但有潜育层存在,沼泽排水差,潜水面位于地表。
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contradication among the people
contradiction
contradiction between the actor and the role
contradiction law
contradiction principle
contradictoriness
contradictory
contradictory formal system
contradictory proposition
contradictory propositional calculus
contradictory relation
contradictory set of formulas
contradictory theory
contradirectional coupling
Contrafactum
contraflexure
contra-flow
contragradience
contragradient
contragradient automorphism
contragradient composition
contragradient isomorphism
contragradient linear transformation
contragradient mapping
contragradient matrix
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