electromagnetic spectrum的音标：electromagnetic spectrum的英式发音音标为：[ɪˌlektrəʊmæg'netɪk 'spektrəm]electromagnetic spectrum的美式发音音标为：[ɪˌlɛktromæɡ'nɛtɪk 'spɛktrəm]...

The electromagnetic spectrum covers an enormous range of frequencies and energies.电磁波谱包括极大的频率和能量范围.Television systems, which transmit 30 picture frames per second, must operate on a broad electromagnetic spectrum.每秒传输30幅...

电磁波频谱...