It is supposed to be washed down the gutter and into the city's vast sewerage system.

它应该是被沿排水沟冲入城市庞大的排水系统。

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Sewerage systems are either'separate'or'combined '.

排水系统有 “ 分流制 ” 和 “ 合流制”.

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The acid waste waters are discharged into a sump or the sewerage system.

酸性废水被送往销毁池或阴沟系统.

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One heavy storm can cause ageing urban sewerage systems to overflow.

一场大暴雨就使城市下水道脏水外溢.

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Sludge disposal facilities should be installed for the need of sewerage treatment.

同时配套建设完善污泥处置系统.

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Unfortunately, the sewerage was not the only issue.

不幸的是, 污水并不是唯一的问题.

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The temporary sewerage pump was installed to pump the sewerage water drain to reduce the overflow.

当局已经安装临时的排污泵在该处以减少污水的溢出.

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Ash and elm trees lined the streets , all of which had a sewerage system.

道路两旁种有青槐和榆树, 并有相当完整的排水系统.

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The pollutants that affect water come mainly from industries, farm, and sewerage systems.

水的污染源主要来自工业 、 农场以及排水系统.

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