power amplification

例句：

1. 1.The power amplifier in the transmitter is designed to boost the signal strength.
   发射器中的功率放大器设计用来增强信号强度。
2. 2.The engineer increased the power of the motor to improve its performance.
   工程师增加了电机的功率以提高其性能。
3. 3. The power amplification circuit was used to amplify the weak radio signals.
   使用功率放大电路来增强微弱的无线电信号。