The two digital signal types are the on-off signal and the pulse train signal.
这两类数字信号分别为通断信号和脉冲序列信号。
Alarm output: frequent on or off signal, control exhaust fan, electrical magnetic valve signal.
报警输出：常开常闭信号，控制排风扇，电磁阀信号。
This mixed signal is why you reject food that has gone off.
这种混合的信号是为什么我们排斥那些变质的食物。
He pressed the red alarm signal to see if it was on or off.
他按了一下红色报警信号钮，检查一下它是开着的还是关着的。
Turn off your signal after you leave the parking space.
离开停车位进入公路行驶后关闭转向灯。
They will fire off a signal flare.
他们将发射一枚信号弹。
Suddenly, a firecracker went off nearby - the signal to start the demonstration.
突然，不远处响起了一声爆竹。这是信号！
The signal was given, and the procession moved off.
信号发出后车队随即出发。
Turn off your hazard lights and turn on your left turn signal.
关闭危险信号灯，打开左转灯。
Did they set them off as a signal to attack?
放天灯表示进攻的信号吗？
Signal the driver to move off.
示意司机离开。
Therefore, if you want to get off, pull the cord above the side window to signal the driver.
所以如果你要下车，得拉一下车窗上端的绳，通知司机。
This train stops to let off passengers on signal.
这列火车按信号停车让旅客下车。
Signal the driver to move off.
他等着发言的信号。
Signal the driver to move off.
他等着发言的信号。
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