开垦草原对草原土壤及植被均有不同程度的扰动作用。
Grassland reclamation disturbs the soil and vegetation in grasslands in varying degrees.
研究具有外界持续扰动作用下双线性系统的最优控制问题。
The optimal control problem is considered for bilinear systems affected by external persistent disturbances.
本实验结果表明，菲律宾蛤仔的生物扰动作用是极其显著的。
The result showed that the bioturbation of the Manila clam was evidenced.
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