所产生的加热作用与电流像哪个方向流动无关。
The heating produced does not depend on which way current is flowing.
超声波作用的物理机制主要包括机械传质作用、加热作用和空化作用。
The physical mechanisms of ultrasound mainly include the effects of mass transfer, heating and cavitation.
磁暴还会对高层大气存在加热作用，改变其密度计组成，中断无线电通信与GPS装置。
Magnetic storms also heat the upper atmosphere, changing its density and composition and disrupting radio communications and GPS units.
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