一束光通过棱镜就会形成光谱。A spectrum is formed by a ray of light passing through a prism.这是一种原子光谱.This is a kind of atomic spectrum.天文学家们必须要从这些恒星上采集更多的光谱来证实他们的推想。Astronomers will have to collect more spectra from these stars to conf...
The increase in the number of rooms available in private homes acted as a palliative to the general accommodation shortage.私宅中可用房间数的增加缓解了客房总体不足的问题。The loan was a palliative, not a cure, for ever-increasing financial trou...