1. 光谱
    The spectrum is the range of different colours which is produced when light passes through a glass prism or through a drop of water. A rainbow shows the colours in the spectrum.

2. 系列;范围
    A spectrum is a range of a particular type of thing.

    e.g. She'd seen his moods range across the emotional spectrum...
           她见识过他的情绪波动会有多大。
    e.g. Politicians across the political spectrum have denounced the act...
           各党派的政客们都对该行为表示谴责。

3. 波谱(如光波波谱、无线电波波谱等)
    A spectrum is a range of light waves or radio waves within particular frequencies.

spectrum什么意思

    e.g. Vast amounts of energy, from X-rays right through the spectrum down to radio waves, are escaping into space...
           大量的能量，从 X 光直到无线电电波，都正被泄露到太空中去。
    e.g. The individual colours within the light spectrum are believed to have an effect on health.
           光谱中不同的颜色被认为对健康有不同的影响。