The polarity of impulse voltage and the polarity of insulator surface electric charge can affect the corona initial time of insulator, the change time - interval and the corona current.

外拖冲击电压的极性与绝缘子表面电荷极性是否相同会影响绝缘子的电晕起始时刻、由流注向先导的转变时间间隔和流注电晕电流。

youdao

I am not sure how much they charge for the patented radio frequency ablation catheter that they use in the renal vessels and the impulse generator.

我不知道医院如何收取肾血管手术和脉冲发生器中使用的特殊射频消融导管的费用。

youdao

The Solar Impulse is powered by about 12, 000 photovoltaic cells that cover massive wings and charge its batteries, allowing it to fly day and night without jet fuel.

WSJ: Sun-powered plane completes California test flight