一个企业所面对的战略问题是如何找到一种方式，通过提供生态学可行的服务，既能为这一生态系统贡献价值，又能从中获取价值。
The strategic question for an enterprise is how to find way of both contributing value to the ecosystem, and drawing value from the ecosystem, through the provision of ecologically viable services.
通过建立自然资源价值分类体系，估算典型生态区生态系统效益功能价值。
The value classification system of natural resource was built up to estimate efficiency and functional value of typical ecosystems.
将土地自然价值分成固定自然价值和可变自然价值，讨论了土地生态环境的价值、价格及区位问题，且将土地生态环境分为四种类型。
In this paper land natural value is separated into fixed and variable parts. Value, price, and location of land environment are discussed. Land environment is divided up four dasses.
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