Group control host is the core of the elevator group control system. It serves as the traffic controller and makes the elevators orderly and efficient.

群控主机是电梯群控系统的核心，它起着交通指挥员的作用，使群控系统中的电梯群有序高效地运行。

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Such information can help reveal the mental state of an air-traffic controller, for example.

例如，这些信息可以帮助揭示一个空中交通管理员的精神状态。

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Think of the controller as the air traffic controller at an airport, giving direction to the coming and going of aircraft.

我们可以将控制器想象为机场的空中交通控制器，指挥飞机的进出方向。

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Does having a cockpit display lessen the importance of the air traffic controller?

CNN: Can technology fix the FAA's air traffic troubles?

One of the biggest challenges -- and ironies -- of his dual career is that the football federation's limited coffers mean the air traffic controller has been unable to fly to Europe to watch those expatriate players who have come on board for Cape Verde's continental mission.

CNN: Flying high: Mourinho mentors Cape Verde's 'Special One'

The pilot and air traffic controller discussed options, including landing at Teterboro airport in New Jersey, the official said.

CNN: Pilot praised for 'masterful' landing