cis-trans isomerism

例句：

1. 1.The molecule has two cis-trans isomers, which can be separated by using a solvent.
   这个分子有两个顺反异构体，可以通过使用溶剂来分离。
2. 2.The study of cis-trans isomerism is important for understanding the properties of organic compounds.
   研究顺反异构体对于理解有机化合物的性质非常重要。
3. 3.The cis-trans isomerism of the compound was determined by using nuclear magnetic resonance spectroscopy.
   通过核磁共振光谱学确定了该化合物的顺反异构体。