A channel over which pilot signal is transmitted.
可在其上传输导频信号的一种信道。
All the pilot can do is to signal if the launch is too fast or abandon the launch if it is too slow.
飞行员所能做的就是，假如起飞太快就发出信号，假如太慢就放弃起飞。
Fortunately, a pilot saw the signal and sent a message by radio to the nearest town.
幸好一位驾驶员发现了这个信号，用无线电给最近的市镇发了电报。
Fortunately, a pilot saw the signal and sent a message by radio to the nearest town.
幸好一位驾驶员发现了这个信号，用无线电给最近的市镇发了电报。
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