然而，有时看似良性的引入却形成了滑稽的环境，或使生态系统陷入困境。
However, sometimes a seemingly benign introduction creates environmental travesty and ecosystem despair.
水是维持生态系统良性循环的根本。
玛纳斯河流域农业生态系统良性演替需建立在绿洲资源要素时空优化配置及其协调开发利用上。
Positive succession should be based on the temporal and spatial distribution and the coordinated utilization of oasis resource factors on the agro-ecosystem along Manas River.
创造满足生态系统良性循环要求的室内绿色环境，是改善日益恶化了的室内环境的根本途径。
Indoor environment problem is increasingly serious. The fundamental way to improve it is to create green environment indoors that meets the demand of making ecosystem circulate healthily.
这对高原生态系统的划分有利于对高原生态系统良性循环的研究。
The division of the ecosystem of this pair of plateaus is favorable to the study on plateau ecosystem benign cycle.
水是维持生态系统良性循环的根本。
Water is essential for keeping the circulation of ecosystem.
指出土地整理的出发点应基于生态系统原理（时间、位置、物种、干扰和景观） ，核心是实现整理区生态系统的良性循环。
The ecological system principle and reason that should follow in the land consolidation and rehabilitation are analyzed in this paper.
提出了青城后山绞股蓝基地农林药复合生态系统良性循环的优化模式。
As a result of the evaluation an optimal model of artificial complex ecosystem circulation for the agricutural-forestry-medi…
提出了青城后山绞股蓝基地农林药复合生态系统良性循环的优化模式。
As a result of the evaluation an optimal model of artificial complex ecosystem circulation for the agricutural-forestry-medi…
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