城市系统是城市生态系统和城市经济系统的复合系统。
Urban system is a reuniting system of urban ecosystem and urban economic system.
而旅游业对当地环境也有正反两方面的影响，如果开发得当，可以使当地的社会-环境-经济系统进入良性循环，反之，当地的生态平衡有被破坏的危险。
The local Society-Environment-Economy system can be made into the good balance because of tourism, otherwise, the local ecological balance perhaps will be in danger of demolishing.
循环经济倡导按照自然生态系统物质循环和能量流动规律来重构经济系统。
Circular economy demands restructuring economic system by the rule of material recycle and energy flow in natural ecological system.
在现代流域环境中，由于人类活动规模和强度在不断的提高，社会经济系统已相当深入地影响了水资源系统和生态系统。
In modern basin in the environment, due to human activity in size and strength, improving the social economic system has quite deep influence on the water resources system and ecological system.
全球气候变化必将对陆地生态系统以及社会经济系统产生广泛的影响。
The global changes will bring about extensive influence on the terrestrial ecosystem system and social economic system necessarily.
系统内要素、系统间相互作用，构成生态系统、经济系统和社会系统，在人们的干预下产生综合效益。
The essential elements within the system and the interaction of intersystem form the ecological system, economic system and social system, which produce composite results with the intervention of man.
以贵阳市区为例，选取自然生态系统指标、社会经济系统指标和农田污染系统指标，建立了土地资源评价模型。
By taking Guiyang City as a case study, the indices for the natural ecosystem, society economy system and cropland pollution system were chosen and the land resource evaluation model was established.
城市人口容量，指一个城市的生态系统和社会经济系统能够支持多大人口规模得以生存的潜力。
The urban population capacity, refers to the potential in an ecosystem or a social economy system of a city that can support the population survive.
城市人口容量，指一个城市的生态系统和社会经济系统能够支持多大人口规模得以生存的潜力。
The urban population capacity, refers to the potential in an ecosystem or a social economy system of a city that can support the population survive.
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