Zap a hydrogen atom and it will resonate at a particular rate: 1420 megahertz (MHz).
轰击氢原子可以与某一特定的频率产生共鸣: 1420兆赫。
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Bandwidth - The range within a band of wavelengths or frequencies, in cable typically measured in megahertz. Fully upgraded cable systems usually offer 750 MHz of bandwidth.
Wireless telephone that permits telecommunication within a defined area that may include hundreds of square miles, using radio waves in the 800-900 megahertz (MHz) band.