这种现象并不仅仅出现在纽约，在美国有将近800个城市依靠破旧的排水系统，使用同一个管道来收集暴雨径流水，工业废水和人用污水。
And New York is not alone. Nearly 800 American cities rely on decrepit systems that collect storm-water run-off, industrial waste and human sewage in the same pipes.
唔，污水管道是全封闭的系统，和暴雨下水管道完全分离。
Well wastewater sewage is a closed system. It's completely separate from the storm drains.
尽管数十亿美元用于升级其道路和建筑物，城市的污水处理系统还是被来势凶猛的暴雨所淹没。
Despite the billions of dollars spent to upgrade its roads and buildings, the city's sewage system appeared quickly overwhelmed by the rainstorm.
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