同分异物现象

例句：

1. 1. The two molecules have the same molecular formula but different structures.
   这两个分子具有相同的分子式，但结构不同。
2. 2.The crystal structure of a compound is often determined by its isomorphic compounds.
   化合物的晶体结构通常由其同分异构体确定。
3. 3. The discovery of new isomorphic compounds has led to significant advancements in materials science.
   发现新的同分异构化合物已导致材料科学的重大进步。