isomerism

例句：

1. 1. The study of isomerism is important for understanding the properties of different organic compounds.
   研究异构体对理解不同有机化合物的性质非常重要。
2. 2.Isomerism can occur naturally in some biological processes, such as the formation of vitamins.
   异构体现象可以在一些生物过程中自然发生，例如维生素的形成。
3. 3. In chemistry, isomerism refers to the ability of two or more molecules to exist in different forms due to differences in their chemical structure.
   在化学中，异构体是指由于分子结构的不同而存在的两种或更多分子的共存能力。