radioamplifier

例句：

1. 1. The radio amplifier is used to amplify the weak signals from the antenna.
   无线电放大器用于放大天线的微弱信号。
2. 2.The radio amplifier was designed to improve the signal-to-noise ratio of the receiver.
   无线电放大器被设计用来提高接收器的信噪比。
3. 3.The engineers used the radio amplifier to boost the power output of the transmitter.
   工程师们使用无线电放大器来提升发射机的输出功率。