To make emergency lights plug into a wall outlet with automatic power failure it can respond, and start automatically.
为了使插入墻上插座应急灯插头它可以有自动断电的反应,并开始自动工作。
The ac adapter (as it's more accurately known) simply converts the ac current from a wall outlet into low-voltage, low-amperage DC current that it provides via a USB port.
AC适配器(这是交流电源更準确的说法)只是把来自墻上插口的交流电转化为低伏特、低安培的直流电源,并通过USB接口充入手机。
The easy way is to purchase an LCD that can be plugged into a wall outlet or car adapter, depending on your needs.
简单的方法是购买一个LCD,它可以根据需要插到墻上的插座或车载适配器上。
Conveniently, the AC adapter can be used with either a wall outlet or a USB port.
电源适配器不仅用于墻上交流电,还可以用US B口,十分方便。
Plugging into a wall outlet is simple, since the PC generally requires wall power also.
插到墻上的插座上非常简单,这是由于PC也都需要墻上的电源插座。