spectrum resources的用法和样例：
例句
- Radio operates, as you might expect, in the public portion of the radio spectrum.
正如想象的那样，无线电工作在无线电频谱的公共部分。 - The current communications capabilities could be increased in a dramatic way by broadening the radio spectrum into the millimetre and optical-frequency ranges.
将无线电频谱扩展到毫米和视频范围，可极大增加当前的通讯能力。
