relay satellite

例句：

1. 1. The relay satellite is responsible for transmitting signals from one location to another.
   中继卫星负责将信号从一个地点传输到另一个地点。
2. 2. The relay satellite plays a crucialrole in maintaining communication between different countries.
   中继卫星在保持不同国家之间的通信方面起着至关重要的作用。
3. 3. The relay satellite is usedto improve the quality of radio signals byrepeating them back to their original source.
   中继卫星用于通过重复回原源来提高无线电信号的质量。