under modulated

例句：

1. 1. Theradio signal was under modulated to preventinterference.
   无线电信号被调制以防止干扰。
2. 2.The speaker used a modulated tone toconvey his message.
   演讲者使用一种调幅语调来传达他的消息。
3. 3. The engineercarefully monitored the modulated signals to ensureaccuracy.
   工程师仔细监控调幅信号以确保准确性。