modulation of continuous wave

例句：

1. 1. The radio station modulated its frequency to better fit the signal.
   该电台通过调制其频率来更好地适应信号。
2. 2. The engineer modulated the transmission to ensure it reached the receiver correctly.
   工程师调制传输以确保正确到达接收器。
3. 3. The scientist modulated his experiment to test different variables.
   科学家调制他的实验以测试不同的变量。