ray modulation

例句：

1. 1.The new radar system uses ray modulation to detect objects in the air.
   新的雷达系统使用射线调制来探测空中物体。
2. 2.In radio engineering, ray modulation is used to transmit signals over long distances.
   在无线电工程中，射线调制被用来在长距离上传输信号。
3. 3. The ray modulation technique was developed to improve the accuracy of radar detection.
   射线调制技术的开发是为了提高雷达检测的准确性。