A thunderstorm had better not open radio, because the radio antenna has the function of the lightning rod, can absorb the lightning, so be sure to save.
雷雨天气最好不要打开收音机，因为收音机的天线有避雷针的作用，会吸收闪电，所以一定要收起来。
2
An analysis of the antenna and scattering theory is an important part in the electromagnetic problems, which describes the energy transformation from a closed circuit system to an open space system.
电磁问题中有很大一类是研究天线和散射理论，即由封闭电路系统向空间开放系统的能量转换。
3
In order to achieve the communication between the ship board antenna and the synchronous communication satellite, a method by the digital guiding closed loop and level open loop tracker is presented.