例句：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.扩展器在某一给定范围的输入电压内产生较大输出电压的转换器 A transducer designed for a given range of input voltages that produces a larger range of output voltag
