考虑到生态系统的复杂性和各因素之间的相关性，能源草的推广使用应该慎重。
Considering the relationship between the complexity of ecosystems and each one of the factors, we should be cautious when making the use of energy grass widespread.
研究结果进一步说明了草原生态系统对放牧反应的复杂性。
The results further show steppe ecosystem complexity under grazing systems.
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