When you talk about direct current circuits, describing the voltage and current in a given situation is pretty straightforward.

当您谈论直流电路时，描述给定情况下的电压和电流非常简单。

These are all basic DC, or direct current circuits, made up of batteries and resistors with current flowing constantly out of the battery in one direction.

这些都是标准的直流或直流电路，由电池和电阻组成，电流不断地从一个方向流出电池。