frequency conversion

例句：

1. 1. The new device can convert frequencies to different wavelengths.
   这款新设备可以将频率转换为不同波长。
2. 2. In radio communication, frequency conversion is essential for transmitting signals.
   在无线电通信中，频率转换对于传输信号至关重要。
3. 3. The scientist used a frequency conversion circuit to enhance the signal strength.
   这位科学家使用了一个频率转换电路来增强信号强度。