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ecological construction
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ecological construction
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ecological construction
生态建设
根据生态学基本原理,通过生态工程技术、法规、管理等手段,协调自然、社会、经济发展间的关系,建立高效、和谐的人工复合生态系统,从而达到既保持生态环境,又使经济持续发展的总目标。
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photographic density
Photographic Department of Xinhua News Agency
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Photographic Encyclopedia of Traditional Beijing Opera Costumes
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