Introduced project appraisal method which allows incorporation of environmental externalities when comparing development alternatives;
引进了项目评估法，在对不同开发方案进行比较时，将环境因素纳入其中。
Introduced project appraisal method which allows incorporation of environmental externalities when comparing development alternatives;
引进了项目评估法，在对不同开发方案进行比较时，将环境因素纳入其中。
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