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- ground wave operating distance 地波作用距离
- On striking the earth, the sky wave bounces back again. 一打到地面，天波又弹跳回来。
- Inevitably, some technically difficult problem must be solved, including the variety of speed about tropospheric propagation, the sky wave disturbance and the near-far problem. 但是,不可避免的遇到几个技术难题,包括无线电传播速度变化的影响,天波干扰问题,以及远近效应问题。
- sky wave propagation for low frequency 低频天波传播
- a sky wave that is reflected by the ionosphere 通过电离层反射回来的天波
- In other words, troops are fighting across low ridges, operating distances are apt to be foreshortened. 换句话说，当部队突越较低的山岭时，交战距离通常缩短。
- A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
- The clear water mirrored the blue sky. 清澈的水中映出蔚蓝的天空。
- Sophisticated techniques have been developed for this process by using electromagnetic carrier waves operating at radio frequencies as well as microwave and millimetre wave frequencies. 在运用电磁载波的领域，高新技术得到进一步的发展，比如射频、微波以及毫米波的频率都被用来作为载频使用。
- high-frequency sky wave field strength 高频天波场强
- a sky wave that is reflected by the ionosphere. 通过电离层反射回来的天波。
- The huge trees were profiled against the night sky. 在夜空的映衬下显出大树的轮廓。
- "Near-Vertical Incidence Sky wave"antenna “NIVS”天线
- Sky Wave Synchronized Long Range Aid to Navigation 天波同步远程导航辅助设备
- sky wave over the horizon radar(SWOTHR) 天波超视距雷达
- The sky is bespangled with stars. 天空中点缀着亮晶晶的星星。
- Lightning zigzagged across the sky. 闪电曲折地在天空划过。
- Research on operation distance of TV homer 电视导引头作用距离研究
- A blackbird nosed up into the sky, singing. 一只山雀唱着歌向空中飞去。
- Searching lights traversed the sky. 探照灯扫过天空。
