In any circuit which operates from a steady voltage source, such as a battery, current flow is always in the same direction.
在任何电路，使用唯一的电压源操作的，比如电池，电流是沿着相同方向流动的。
In any circuit which operates from a steady voltage source, such as a battery, current flow is always in the same direction.
在任何电路，使用唯一的电压源操作的，比如电池，电流是沿着相同方向流动的。
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