kilomegahertz

例句：

1. 1. The device operates at a frequency of 300 million hertz.
   该设备以3亿赫兹的频率运行。
2. 2.This technology is capable of transmitting data at the speed of light, which is equivalent to 300 million hertz.
   这项技术能够以光速传输数据，相当于3亿赫兹。
3. 3.In the field of radio communication, kilohertz waves are used for short-range communication.
   在无线电通信领域，千兆赫兹波用于短距离通信。