To control the input voltage to make the pump-motor system to work in the highly active range. So it can make the operating mode of the pump-motor system gradually change, to work in the highly active range.
在输送液体过程中,由于水泵输送介质密度的变化,电动机――水泵系统的高效段产生漂移,为适应这一变化,这时调节电动机的输入电压,从而使电动机――水泵系统工况连续变化,以使其在较高效率范围内工作。
参考来源 - 竖直输送系统中节能曝气泵的实验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Counterfeit medicines range from products containing no active ingredients to those containing highly toxic substances.
假冒药物范围很广，既有不含任何有效成分的产品，也有含剧毒物质的产品。
But they still averaged a range of just under five acres. The pets were highly active just 3 percent of the time, compared with 14 percent for the cats that need to find their own food.
家猫高度活跃的时间只有3%，而需要自行觅食的野生猫科动物则有14%的时间是保持高度兴奋状态的。
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