有两种对电解质中金属表面提供阴极保护的基本方法，它们是原电池阴极保护和外加电流阴极保护。
There are two basic methods of applying cathodic protection to a metallic structure in contact with an electrolyte. These are galvanic cathodic protection and impressed current cathodic protection.
随着外接电阻值的增大，微生物燃料电池的输出电流变小，符合原电池电极的一般规律。
When external resistance is increased, the MFC output electric current becomes smaller and smaller. The principle is in agreement with primary cell electrode.
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