To build Urban Recycling Economy System will be a significant object much pursued by human beings in the 21st century.
建设城市循环经济体系是全人类在21世纪努力追求的一个重要目标。
To build Urban Recycling Economy System will be a significant object much pursued by human beings in the 21st century.
建设城市循环经济体系是全人类在21世纪努力追求的一个重要目标。
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