modulating function

例句：

1. 1. The radio station is responsible for modulating the frequency of its broadcasts.
   该电台负责调制其广播的频率。
2. 2.The engineer must modulate the signal to match the transmission line's impedance.
   工程师必须调制信号以匹配传输线的阻抗。
3. 3.The scientist discovered a new method to modulate the light in a laser beam.
   科学家发现了一种新的方法来调制激光束中的光。