模拟时域，或波形。模拟时域信号不同于其他信号，它通过信号电平传输有用的信息，而这些电平时随时间变化的。
Analog time domain, or shape, signals differ from other signals in that they convey useful information not only in the signal level, but also in how this level varies with time.
模拟时域，或波形。模拟时域信号不同于其他信号，它通过信号电平传输有用的信息，而这些电平时随时间变化的。
Analog time domain, or shape, signals differ from other signals in that they convey useful information not only in the signal level, but also in how this level varies with time.
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