求翻译：雨水管网则收集雨水，排入河流；城市污水含有大量的氮、磷和有机物，如处理不当将严重影响环境，所以必须设污水厂对其进行处理，以使出水达到国家排放标准。是什么意思？

Storm sewer to collect rainwater into the river; urban sewage contains large amounts of nitrogen, phosphorus and organic matter, such as dealing with inappropriate will seriously affect the environment, it is necessary to set the wastewater treatment plant to be processed, the effluent to reach the

Rain water harvesting is the Internet, and drain into the river; urban waste water contains large amounts of nitrogen, phosphorus and organic matter, such as improper handling will seriously impact on the environment, so it must be set to the sewage treatment plant for processing in order to use wat

The storm sewer system collects the rain water, disperses into the rivers; The city sewage will include the massive nitrogen, the phosphorus and the organic matter, if processing not when will be serious affects the environment, therefore will have to set up the sewage factory to carry on processing

Storm sewer system to collect rainwater, discharge into the River; urban sewage contains large amounts of nitrogen, phosphorus and organic matter, will seriously affect the environment if not handled, so you must set up the sewage plant to process it, to bring the water to the national emission stan

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