yán / jiū / rén / yuán / gēn / jù / guāng / pǔ / zhōng / de / bō / shù / pàn / duàn / yàng / pǐn / de / chéng / fèn研究人员根据光谱中的波数判断样品的成分。Researchers determine the composition of a sample from the wave numbers in its spectrum.