Take Kenli County for example, trend of the ecological system health was judged from the lengthways time.

以山东省垦利县生态系统为例，从时间纵向上判断区域生态系统健康的走势。

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According to the ecological environment situation of main city zone of Wuhan, the article establishes health evaluation index system of urban green land in this area.

本文以武汉市主城区城市绿地为研究对象，对其绿地现状进行健康评价。

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