以下为句子列表：
英文: The authors simply summarize the spatial distribution of pollutant enrichment factor and factor analysis methods are applied to study the sources of pollutant, and the contributing degree of each source.
中文: 简要地概述了污染质的空间分布特征，并应用富集因子和因子分析法研究分析了污染质的来源，判别污染源的贡献度。
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