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生态退化
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生态退化
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生态退化
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ecological degradation
生态退化
在一定的时空背景下,在自然因素、人为因素或二者共同作用下,导致生态要素和生态系统发生的不利于人类和生物生存的量变和质变的过程或结果。
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basic equation
basic equations of anisotropic elasticity
basic equations of fluid mechanics
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Basic Farmland Protection Ordinance
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basic fibroblast growth factor,FGF
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basic force in project decision-making organization
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