A black flag in a car race is the signal for a driver to go to the pits.

在汽车比赛中，黑旗是要车手进维修站的信号。

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One reason this is hard is that radio telescopes must chop the spectrum into fine portions to study it, like tuning into a signal on a car radio.

研究工作进展困难的一个原因是，正如汽车收音机的调频一般，射电望远镜必须把光谱按照波段分成易于研究的片段。

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Imagine flipping on the turn signal or changing the radio station in your car — remotely.

可以将其想象为远程打开汽车的转向灯或改变车里的电台频道。

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The computer then takes the signal and gives the driver spoken directions on how to drive the car to avoid an accident.

VOA: special.2009.11.03

The device sends a signal to a computer at the back of the car.

VOA: special.2009.11.03

A green light on a traffic signal means your car can continue on.

VOA: special.2010.05.23

"You'll arrive in a town - and there will be a signal sent to your car not to exceed a maximum speed, and you won't be able to, and distance to the car in front will also be controlled, " he said.

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This included a weekend in a remote area of North Carolina when my cell signal was roaming and several car rides when I used BlackBerry Maps for navigation.

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Another question is whether the cost of the signal (the cost of the car) is worth its signaling value.

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