Z band

例句：

1. 1.The Z band is the lowest frequency range of radio waves.
   Z波段是无线电波的最低频率范围。
2. 2. The Z band is used for communication in remote areas.
   Z波段用于偏远地区的通信。
3. 3. The Z band is a critical part of modern technology.
   Z波段是现代技术的关键部分。