Were there no transformers to switch the voltage, long-distance transmission of electricity would be impossible?
要是没有变压器来调节电压，远距离输送电力是不可能的。
The function of the transformers is to change electric power from one voltage to another.
变压器的功用就是把电力从一种电压改变为加一种电压。
The function of the transformers is to change electric power from one voltage to another.
变压器的功用就是把电力从一种电压改变为加一种电压。
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