以下为句子列表：
英文: Based on its structure and properties the organic/inorganic hybrid of polyhedral oligomeric silsesquioxanes (POSS) are summarized. And the development tendency of POSS was discussed.
中文: 摘要从笼型倍半硅氧烷的结构特点及主要性能方面出发，对笼型倍半硅氧烷的有机／无机杂化改性进行了综合性描述，评述了它们的发展趋势。
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英文: This paper by using examples of disubs tution cyclohexanes with different and identical functional groups, examines some stereochemistry problems puzzling to stuaents, such as the configuvation conformation, and enantiomorphism isomers, and presents some
中文: 摘要以基团相同和不同的二取代环己烷为例，分析了环己烷衍生物的构型、构象和对映异构等学生易模糊的立体化学问题。
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