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数学函数
两个集合间的一种二元关系,使得第一个集合中的任一元素都关联至第二个集合中的单一元素。又称映射。
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forestry residues
forestry resource economics
forestry resources data mining
forestry science
forestry sensor network
forestry sociology
forestry speciality survey
forestry stakeholders
forestry statistics
forestry subsidized loans
forestry sustainable development
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forestry technology and economic results
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forests and environmental pollution
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forest-shrubland-grassland faunal group of subtropical zone in China
forest-shrubland-grassland faunal group of tropical zone in China
forests in China
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forest soil organic matter decomposition
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