“Three-North Shelterbelt Program”的概念、定义、翻译、参考文献-科学参考

单词	Three-North Shelterbelt Program
释义	Three-North Shelterbelt Program Encyclopedia 农学荒漠化治理释 Three-North Shelterbelt Program“三北”防护林工程在中国西北、华北、东北地区由政府批准实施的一项防护林建设工程。
随便看	nilpotent group nilpotent group of class k nilpotent ideal nilpotent index nilpotent Lie algebra nilpotent Lie group nilpotent Lie group representation nilpotent linear operator nilpotent linear transformation nilpotent matrix nilpotent number nilpotent operator nilpotent orbit nilpotent part nilpotent product nilpotent radical nilpotent ring nilpotent ring (algebra) nilpotent semigroup nilpotent set nilpotent space nilpotent subalgebra nilpotent subgroup nilpotent subset nilpotent superalgebra

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