spectrum spread的用法和样例：
例句
- It uses spread spectrum technology.
它使用扩频技术。 - A small scale digital trunking communication system based on the spread spectrum technology was presented.
介绍了一种基于扩频技术的全双工通信小型集群通信系统。 - 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。
