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短语
environmental conservation
教育 Umweltsicherung f
武器和枪械制造 Naturschutz m
环境 Umweltschutz m
environmental conservation Efforts and activities to maintain and sustain those attributes in natural and urban environments which are essential both to human physical and mental health and to enjoyment of life
环境 Umweltschutz m
environmental conservation: 3 短语, 3 学科
一般1
建造1
环境1