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。
Such information can help reveal the mental state of an air-traffic controller, for example.
自上世纪50年代以来，航空服务一直依赖于地面导航的航道系统，飞机被迫按低效航线飞行，以与空中交通管理员保持联系。
Air travel still relies on a ground-based tracking system from the 1950s, which forces planes to use inefficient routes in order to stay in contact with controllers.
空中交通管理员做什么？
空中交通管理员的主要责任就是保证安全。
一旦你成为空中交通管理员，需要每2年通过工作绩效考试，每一年通过体检。
Once you become an air traffic controller, you will have to pass job performance exams twice a year and physical exams once a year.
一旦你成为空中交通管理员，需要每2年通过工作绩效考试，每一年通过体检。
Once you become an air traffic controller, you will have to pass job performance exams twice a year and physical exams once a year.
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