The researchers collected water samples from gutters, puddles, and streams in two locations: an urban slum and a rural village.
研究者搜集了位于一个城市贫民窟和一个乡村的水样，这些水样分别来自排水沟，水坑以及河流。
When boundaries between rural and urban areas are blurred by streams of people.
当城乡边界模糊在熙攘的人流；
When boundaries between rural and urban areas are blurred by streams of people.
当城乡边界模糊在熙攘的人流；
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