电解：使电流通过电解质溶液而在阳极，阴极引起氧化还原反应的过程。
Electrolysis: make the current through the electrolyte solution at the anode and cathode cause REDOX reaction process.
燃料电池由阳极、阴极、电解质和外部电路等组成。
Fuel cell consists of anode, cathode, electrolyte and external circuit.
在最简单的情形下，阳极是一种金属如铁，阴极是另一种金属如铜，在两个电极处的电解质可能有相同的组成或不相同的组成。
In the simplest case, the anode would be one metal, perhaps iron, the cathode another, say copper, and the electrolyte might or might not have the same composition at both electrodes.
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