frequency adjuster

例句：

1. 1. The frequency adjuster on the radio is very useful for tuning in different stations.
   收音机上的调频器对于调频不同电台非常有用。
2. 2. The engineer used a frequency adjuster to tune the car's engine to the optimal operating range.
   工程师使用一个频率调整器将汽车的引擎调至最佳运行范围。
3. 3. The frequency adjuster was designed to prevent interference between different frequencies.
   这个频率调整器被设计来防止不同频率之间的干扰。