radio relay satellite

例句：

1. 1. The radio relay satellite is used to transmit signals from one location to another.
   中继卫星用于从一个地点向另一个地点传输信号。
2. 2. This satellite relay system allows for efficient communication between different countries.
   这个卫星接力系统允许不同国家之间进行高效的通信。
3. 3.Satellites are crucial in providing global coverage and relaying signals across vast distances.
   卫星在提供全球覆盖和跨越广阔距离的信号传递方面至关重要。