你要朝哪个方向转，必须发出信号。
简单而言，传统意义上的危险信号都指着同一个方向。
同样，它一次仅能传送一个方向上的数字信号。
Similarly, it can carry digital signals in on direction at a time only.
方向控制信号由电压比较电路生成。
Direction control signal is given by the voltage comparison circuit.
在相干光通信等方面，要求信号光与本地振荡光偏振方向相匹配。
The polarization direction of signal is required to match with that of local oscillator.
与王文博老师为同一导师组，研究方向：移动通信与信号处理。
His research area is focus on mobile communication and signal processing.
在本文中，笔者从计算机技术的角度出发，对心电信号研究中的三个重要方向进行了探讨。
This paper approaches three questions about the study of ECG with the technology of computer.
城市铁路用信号系统技术的今后方向性将会如何？
In which direction is the urban rail signalling technology heading?
每一方向都有红、黄、绿组成的交通信号灯。
Each direction has a red, yellow, green, composed of traffic lights.
每一方向都有红、黄、绿组成的交通信号灯。
Each direction has a red, yellow, green, composed of traffic lights.
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