以下为句子列表：
英文: The research revealed that the nature of multi-strata and heterogeneity for rural drinking water safety factors and outside features of each component have made rural drinking water safety a stalemate.
中文: 研究表明，农村饮水安全中要素的多层性和异质性特征以及各子要素的外部性特征，使农村饮水安全陷于困境。
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