求翻译：　　运算放大器是用途广泛的器件，接入适当的反馈网络，可用作精密的交流和直流放大器、有源滤波器、振荡器及电压比较器。是什么意思？

The op amp is versatile device, access the appropriate feedback network can be used as precision AC and DC amplifiers, active filters, oscillators and voltage comparator.

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　Transports the input electric potential which puts usually to request to be higher than negative supply some value, but is lower than positive electricity source some value.Transports after the special design puts may permit the input electric potential in from the negative supply to the positive e

　　Operational amplifier is a versatile device, access the appropriate feedback network, can be used as an accurate active AC and DC Amplifiers, filters, oscillators and voltage comparators.

　　Operational amplifier is a versatile device, access the appropriate feedback network, can be used as an accurate active AC and DC Amplifiers, filters, oscillators and voltage comparators.