• 1. 环的谱: spectrum of a ring
• 2. 环的极大谱: maximal spectrum of a ring

• 1.因此，根据傅里叶变换的共轭对称性，提出了更具有一般性的长方环傅里叶周向谱能量百分比新算法。
  So a new algorithm with rectangle loops Fourier spectral energy percentage is proposed by analyzing the conjugate symmetry of Fourier transform.
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• 2.红外谱图表明，在原来的CPP分子链上接上了芳环基团。
  Infrared spectroscopy shows that aromatic group is grafted onto the molecular chain of CPP.
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• 3.通过对该合聚物的IR和NMR谱图分析，得知该聚合物含有酯基和酮基的结构单元，以及环缩醛的侧链。
  The IR and NMR spectra of the polymers indicated that the polymer structure contained ester and ketone units in the backbone, and a cyclic acetals as side chain.
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