1. They could look at the spectra of the light the moons reflected.
    他们可以观察月亮反射的光的光谱。

2. spectrum什么意思

2. There is a wide spectrum of opinions on this question.
    在这个问题上有着各种不同的意见。

1. spectrum

1. 光：经过改良Private Structure电光(Spectrum)系列内衣宣传海报Private Structure全新电光(Spectrum)系列将炎热夏季花俏的烫花与缤纷的色彩配搭统统收敛,早秋第一时间带给你丝丝质朴气息,色彩却依然保留下彩虹光泽.

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.

    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。

1. a broad range of related objects or values or qualities or ideas or activities

2. an ordered array of the components of an emission or wave