Effluent from the primary treatment slowly flows through a shallow artificial stream.

从初级处理的污水缓缓流过浅的人工流。

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Rockery, artificial lake, pond, stream and so on.

假山、人工湖边、池边、溪边等等。

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Rockery, artificial lake, pond, stream and so on.

假山、人工湖边、池边、溪边等等。

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