radio-range beam

Like the searchlight beam, the radio beam cannot be made very sharp; it tends to spread.

无线电射束也象探照灯的光束一样, 是不能高度集中的; 它总要散开.

Following a radio beam.

跟随无线电波.

The radio beam came from outer space.

这个无线电波束来自外太空.

The theoretical model and numerical results can provide the basis of qualitative and quantitative analysis of fibre radio application system using MZM such as radio over fibre ( RoF) and optical controlled microwave beam forming network.

理论模型和数值结果可为使用马赫-曾德尔调制器的光微波系统如光纤无线电（RoF）和光控微波波束形成网络等提供定性和定量性能分析的基础。

A radio signal tells the pilot of an airplane when his plane is off the beam.

飞机脱离航道时，会有一个无线电信号告诉驾驶员。