radiofrequency spectrum的用法和樣例：
例句
- Radio operates, as you might expect, in the public portion of the radio spectrum.
正如想象的那樣，無(wú)線(xiàn)電工作在無(wú)線(xiàn)電頻譜的公共部分。 - The current communications capabilities could be increased in a dramatic way by broadening the radio spectrum into the millimetre and optical-frequency ranges.
將無(wú)線(xiàn)電頻譜擴展到毫米和視頻范圍，可極大增加當前的通訊能力。
