The device sends a weak electrical current through electrodes placed on a person's head.

该设备通过在人体头部安放电极发送微电流来达到防晕车的目的。

It interacts with the existing electric field, which induces a weak electric current that travels through your finger and eventually back into the phone.

它与现有的电场相互作用，产生微弱的电流， 穿过你的手指，最终返回手机。