extreme high frequecy

例句：

1. 1. The radio waves are emittedfrom the antenna at an extreme high frequency.
   无线电波从天线以极高的频率发射出来。
2. 2. The ultra-high frequency signals areused in radar systems for detection and tracking.
   超高频信号用于雷达系统中的探测和跟踪。
3. 3. The scientists have developed a newdevice that can detect extreme high frequency signals.
   科学家们已经开发了一种新设备，可以检测到极端高频信号。