dumb repeater

例句：

1. 1. The dumb repeater was usedto transmit signals over long distances.
   哑巴复读机被用来在长距离上传输信号。
2. 2. The echo repeater helpedus locate the lost aircraft in the stormy weather.
   回声重复器帮助我们在暴风雨中定位了失事的飞机。
3. 3. Theengineer designed a new type of dumb repeater that could be easily repaired.
   工程师设计了一种新型的哑巴重复器，这种重复器可以很容易地修复。