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1·The water quality of the plant can meet the drainage standard after centralized treatment of the waste water.

该电厂采用废水集中处理后，水质能达到排放标准。

2·For cleanness of waters in our country, it is essential to treat domestic sewage with purification tank under dispersed state, besides sewage treatment plant under centralized state.

为了确保我国水体清洁，生活污水除了集中处理之外，分散式的净化槽系统也是不可缺少的。