So, the indicator system for the study have a great theoretical and practical significance.

因而，该指标体系的研究具有十分重要的理论意义和现实意义。

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It is important to establish the indicator system in enterprises' environmental performance evaluation.

环境绩效评估指标体系的建立是企业环境绩效评估的关键环节。

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Then, using principal component analysis method, it set up the indicator system for land-use function district.

其次，采用主成分分析法确定土地利用功能分区指标。

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Often the goal is to find the key indicator of a problem or to track the performance of a system.

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