1. A strain may be defined as an organic compound containing a benzene ring plus a chromophore and auxochrome group.
   染料定义为含有苯环与呈色官能基与辅助成色官能基的化合物。
2. The benzene ring and alkene structural group are much more stable than structural group of sulfoacid for the carbonifying process of polystyrene.
   在碳化过程中，聚苯乙烯阳离子交换树脂的苯环结构和烯烃基团比磺酸基团稳定。
3. The enantioselectivity of N-dodecanoyl-L-proline-3,5-dimethyl-anilide is also good, but the basic line fluctuates strongly due to containing benzene ring in its molecular structure.
   虽然用N-十二酰基-L-脯氨酸-3,5-二甲基苯胺作添加剂，手性选择性也较好，但由于含有苯环，紫外吸收增强，基线波动严重。

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