premodulation

例句：

1. 1. The premodulation of the microwave oven is crucial for its performance.
   微波炉的预调制对于其性能至关重要。
2. 2. The premodulation process involves adjusting the frequency of the signal to optimize its transmission.
   预调制过程涉及调整信号的频率以优化其传输。
3. 3. In radio communication, premodulation plays a critical role in reducing interference and improving signal quality.
   在无线电通信中，预调制在减少干扰和提高信号质量方面起着关键作用。