作为对外电场的反应，电子波要稍稍变形或移位。
In response to an outside electric field, the electron wave is slightly distorted or displaced.
利用四位双向移位寄存器等电子元件可制作能直观显示直流电流方向的模拟演示仪。
Four-bit bidirectional shift register was used to produce the device for demonstrating the direction of direct current.
对于便携式电子产品来说，运算放大器可算是万能的信号调节电路，因为它可以执行滤波器、放大器、电压感测器、电平移位器、缓冲器、甚至开关等多种不同功能。
Operational amplifier is the most versatile signal conditioning block in any portable system. It can be a filter, an amplifier, an voltage detector, a level shifter, a buffer or even a switch.
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