以下为句子列表：
英文: Nitrogen fixation trees of Leguminosae and non-Leguminosae are important biological nitrogen fixation resources.
中文: 摘要豆科及非豆科固氮树种是重要的生物固N资源。
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英文: The biological nitrogen fixation is a global strategic problem, and is very significant to environment, food and population and so on.
中文: 摘要生物固氮是一个全球性的战略课题，它对环境、粮食、人口等问题有著重要意义。
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英文: This approach seeks to use various sources of plant nutrients, mineral fertilizers, organic manures, crop residues and biological nitrogen fixation for each farm's cropping system and offers the farmers the best opportunity for sustainability while protec
中文: 这一方法，为每个农场的种植制度寻求利用各种植物养分资源，诸如矿质肥料、有机肥料、作物残体和生物固氮，并且在保护环境和资源的同时，给农民提供更好的持续发展生产的机会。
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