The user controls Paramecia using a handheld device, which delivers electrical pulses to different sides of the playing field.

用户用一台向游戏场景不同方向发送电子脉冲的手持设备控制草履虫。

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Ground fault circuit interrupters are required whenever moisture may contact electrical equipment or the user.

只要湿气可能接触到电器设备或使用者，则都应配备接地故障断路器。

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These systems may record and display data such as the time a user spends in bed, sits in a chair, USES the front door or operates a particular electrical appliance such as their oven.

这些系统可记录并显示，如用户的时间花费在床上的数据，坐在椅子上，采用前门或经营某电器例如他们的烤箱。

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The first advantage is that ozone can be made on the spot (from air) with an electrical discharge, so it does not have to be trucked to the user.

FORBES: The Ozone Solution