“grassland degradation in China”的概念、定义、翻译、参考文献-科学参考

单词	grassland degradation in China
释义	grassland degradation in China Encyclopedia 理学中国草地退化释 grassland degradation in China中国草地退化中国天然草地在干旱、侵蚀、盐碱、虫鼠害等不利自然因素和过度放牧等不合理利用影响下，草地生物生产力减少、质量下降、草地利用率降低，甚至失去利用价值的过程。
随便看	extension of a field extension of a function extension of a group extension of a Lie algebra extension of a mapping extension of a measure extension of a module extension of an associative algebra extension of an equation extension of an ideal extension of an operator extension of a ring extension of a ring by a module extension of a semigroup extension of a space extension of a structure extension of a topological space extension of a valuation extension of C* algebra extension of C-algebra extension of C-algebra (exact sequence) extension of concept extension of groups extension of scalars Extension of the Materia Medica

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