专家知道便携式电子设备发出辐射能影响飞机导航和通讯所用的波长。
Experts know that portable device emit radiation which affects those wavelengths which aircraft use for navigation and communication.
由玻璃质的、粗糙的岩石微粒构成的火山灰云不仅堵塞发动机，还会磨损挡风玻璃，损坏飞机导航与通讯系统。
By glassy, the eruption cloud that coarse rock particle forms jams not only engine, still can wear away windshield, attaint plane navigation and communication system.
它在对云层、降水、冰雹和雷暴的气象探测以及在船舰和飞机的导航中，起着日益重要的作用。
It plays an increasingly important part in meteorology for cloud, precipitation, hail and thunderstorm detection as well as the navigation of aircraft and ships.
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