中继器

例句：

1. 1. The signal was lost dueto a faulty RF repeater.
   由于一个故障的射频中继器，信号丢失了。
2. 2. The engineer replaced thedamaged repeater with a new one.
   工程师用一个新的替换了损坏的中继器。
3. 3. The repeater helped to extend therange of the communication system.
   中继器帮助扩展了通信系统的覆盖范围。