The drainage function of split-flow rainwater system is affected by non-rainwater inflow, and directly discharging the mixed wastewater can cause serious pollution of receiving bodies.
2
由于污水的收集率、处理率低，绝大多数的污水直接排入城市水体，大大超出了受纳水体的自净能力。
Because a low collecting and dealing rate of sewage, most polluted water will go directly into city water systems.
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