heptatomic ring

例句：

1. 1.The heptatomic ring is a fascinating structure in chemistry.
   七原子环在化学中是一个引人入胜的结构。
2. 2.The heptatomic ring has been studied extensively in the field of materials science.
   七原子环在材料科学领域得到了广泛的研究。
3. 3.The heptatomic ring is known for its unique properties and applications in various industries.
   七原子环因其独特的性质和在各行业中的应用而闻名。