英文关键词: fuzzy theory ; non-point source pollution ( NPSP ) ; rainfall ; spatial variability
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12】非点源污染（non-point source pollution，NPSP）是指没有 集中的污染物排放源，污染物在较大 地理空间范围内形成，并分散地进入 环境所造成的污染，也被...
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Hamid Jafari, project manager of the WHO-National Polio Surveillance Project (NPSP), has said this is the closest the world has come to global eradication of polio.
BBC: India's battle to finish off polio
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