Some aeronautical and aerospace technicians specialize in avionics (navigational and communications equipment), flight testing, or quality control.
一些航空专家专攻于航空电子技术(导航及通讯设备)，飞行测试，质量管理。
Mobile phones are banned in flight out of fear they can disrupt navigational systems.
移动电话在飞行中是禁止使用的，因为人们担心它会干扰导航系统。
Mobile phones are banned in flight out of fear they can disrupt navigational systems.
移动电话在飞行中是禁止使用的，因为人们担心它会干扰导航系统。
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